Christians are judgmental. 

“The Bible says ‘don’t judge.’ “
Side note – if you don’t believe in The Bible, don’t quote it to make your point – unless you are willing to accept what it says. 
It seems only followers of Jesus are subject to this restriction.

Did Jesus teach that we should not judge? Yes. And no. Sort of. What did He really teach about judging others?

When modern Americans say “don’t judge”, they mean “don’t tell me what to do.” 
Don’t tell me what is good and what is evil.
Don’t give me your version of sin and righteousness. 
I am my own law – as long as I am not hurting anyone else, I can do anything I want. 

What did Jesus say?

“Do not judge, or you too will be judged. For in the same way you judge others, you will be judged, and with the measure you use, it will be measured to you. “Why do you look at the speck of sawdust in your brother’s eye and pay no attention to the plank in your own eye? How can you say to your brother, ‘Let me take the speck out of your eye,’ when all the time there is a plank in your own eye? You hypocrite, first take the plank out of your own eye, and then you will see clearly to remove the speck from your brother’s eye. (Matthew 7:1-5 NIV)

37 “Do not judge, and you will not be judged. Do not condemn, and you will not be condemned. Forgive, and you will be forgiven. 38 Give, and it will be given to you. A good measure, pressed down, shaken together and running over, will be poured into your lap. For with the measure you use, it will be measured to you.”
41 “Why do you look at the speck of sawdust in your brother’s eye and pay no attention to the plank in your own eye? 42 How can you say to your brother, ‘Brother, let me take the speck out of your eye,’ when you yourself fail to see the plank in your own eye? You hypocrite, first take the plank out of your eye, and then you will see clearly to remove the speck from your brother’s eye. (Luke 6:37-42 NIV)

What did the followers of Jesus say?

– Don’t judge

You, therefore, have no excuse, you who pass judgment on someone else, for at whatever point you judge another, you are condemning yourself, because you who pass judgment do the same things. Now we know that God’s judgment against those who do such things is based on truth. So when you, a mere human being, pass judgment on them and yet do the same things, do you think you will escape God’s judgment? Or do you show contempt for the riches of his kindness, forbearance and patience, not realizing that God’s kindness is intended to lead you to repentance? (Romans 2:1-4 NIV)

Romans 14:2-4
New International Version (NIV)
One person’s faith allows them to eat anything, but another, whose faith is weak, eats only vegetables. The one who eats everything must not treat with contempt the one who does not, and the one who does not eat everything must not judge the one who does, for God has accepted them. Who are you to judge someone else’s servant? To their own master, servants stand or fall. And they will stand, for the Lord is able to make them stand.

I care very little if I am judged by you or by any human court; indeed, I do not even judge myself. My conscience is clear, but that does not make me innocent. It is the Lord who judges me. Therefore judge nothing before the appointed time; wait until the Lord comes. He will bring to light what is hidden in darkness and will expose the motives of the heart. At that time each will receive their praise from God. (1 Corinthians 4:3-5 NIV)

So then, each of us will give an account of ourselves to God. Therefore let us stop passing judgment on one another. Instead, make up your mind not to put any stumbling block or obstacle in the way of a brother or sister. (Romans 14:12, 13 NIV)

Brothers and sisters, do not slander one another. Anyone who speaks against a brother or sister or judges them speaks against the law and judges it. When you judge the law, you are not keeping it, but sitting in judgment on it. There is only one Lawgiver and Judge, the one who is able to save and destroy. But you—who are you to judge your neighbor? (James 4:11, 12 NIV)

– Judge

If any of you has a dispute with another, do you dare to take it before the ungodly for judgment instead of before the Lord’s people? Or do you not know that the Lord’s people will judge the world? And if you are to judge the world, are you not competent to judge trivial cases? Do you not know that we will judge angels? How much more the things of this life! Therefore, if you have disputes about such matters, do you ask for a ruling from those whose way of life is scorned in the church? I say this to shame you. Is it possible that there is nobody among you wise enough to judge a dispute between believers? But instead, one brother takes another to court—and this in front of unbelievers! Or do you not know that wrongdoers will not inherit the kingdom of God? Do not be deceived: Neither the sexually immoral nor idolaters nor adulterers nor men who have sex with men nor thieves nor the greedy nor drunkards nor slanderers nor swindlers will inherit the kingdom of God. (1 Corinthians 6:1-6, 9, 10 NIV)

It is actually reported that there is sexual immorality among you, and of a kind that even pagans do not tolerate: A man is sleeping with his father’s wife. And you are proud! Shouldn’t you rather have gone into mourning and have put out of your fellowship the man who has been doing this? For my part, even though I am not physically present, I am with you in spirit. As one who is present with you in this way, I have already passed judgment in the name of our Lord Jesus on the one who has been doing this. So when you are assembled and I am with you in spirit, and the power of our Lord Jesus is present, hand this man over to Satan for the destruction of the flesh, so that his spirit may be saved on the day of the Lord. (1 Corinthians 5:1-5 NIV)

I wrote to you in my letter not to associate with sexually immoral people— not at all meaning the people of this world who are immoral, or the greedy and swindlers, or idolaters. In that case you would have to leave this world. But now I am writing to you that you must not associate with anyone who claims to be a brother or sister but is sexually immoral or greedy, an idolater or slanderer, a drunkard or swindler. Do not even eat with such people. What business is it of mine to judge those outside the church? Are you not to judge those inside? God will judge those outside. “Expel the wicked person from among you.” (1 Corinthians 5:9-13 NIV)

“Don’t pick on people, jump on their failures, criticize their faults—unless, of course, you want the same treatment. Don’t condemn those who are down; that hardness can boomerang. Be easy on people; you’ll find life a lot easier. Give away your life; you’ll find life given back, but not merely given back—given back with bonus and blessing. Giving, not getting, is the way. Generosity begets generosity.” (Luke 6:37, 38 MSG)

“Don’t pick on people, jump on their failures, criticize their faults— unless, of course, you want the same treatment. That critical spirit has a way of boomeranging. It’s easy to see a smudge on your neighbor’s face and be oblivious to the ugly sneer on your own. Do you have the nerve to say, ‘Let me wash your face for you,’ when your own face is distorted by contempt? It’s this whole traveling road-show mentality all over again, playing a holier-than-thou part instead of just living your part. Wipe that ugly sneer off your own face, and you might be fit to offer a washcloth to your neighbor. (Matthew 7:1-5 MSG)

ONE MORE THING

Matthew 18:
15 “If your brother or sister[b] sins,[c] go and point out their fault, just between the two of you. If they listen to you, you have won them over. 16 But if they will not listen, take one or two others along, so that ‘every matter may be established by the testimony of two or three witnesses.’[d] 17 If they still refuse to listen, tell it to the church; and if they refuse to listen even to the church, treat them as you would a pagan or a tax collector.

If he won’t listen to the church, you’ll have to start over from scratch, confront him with the need for repentance, and offer again God’s forgiving love.

Here in the age of grace, the point is repentance, forgiveness, and restoration.