Very good points. But remember Matthew 7:1-5 as well.
You are correct. The mantra of the left is and always has been "JUDGE NOT, LEST YE BE JUDGED." In other words, "shut up," you have no right to tell me what I can or cannot do.
The responsibility of those in the church is to "judge" other members of the body with the heart of God. If someone does "fall" our responsibility is to attempt to restore that individual not to destroy them. The individual could have been misled into their life of sin. However, if in that restoration attempt they tell you to go to hell, you have no other recourse but to throw them out of the church body.