In Matthew 25:35-36,40 says- For I was an hungered, and ye gave me meat: I was thirsty, and ye gave me drink: I was a stranger, and ye took me in: Naked, and ye clothed me: I was sick and ye visited me: I was in prison, and ye came unto me. And the king shall answer and say unto them, Verily I say unto you, Inasmuch as ye have done it unto one of the least of these my brethren, ye have done it unto me.
Jesus is God- and God the Father will judge everyone by what they did with his son, Jesus. Doing something for Jesus is doing something for other people. Treating all people as if they are Jesus is what religion is about.
It is easy to see Jesus in the people you know and in people you see everyday, ignore whatever you don't see of Jesus in them.
Then, if there are other things that need to be paid attention to in people, handle those things as Jesus would have handled them.
Romans 8:29 says- For whom he did foreknow, he also did predestinate to be conformed to the image of his Son
People you meet everyday are being conformed to the image of Christ- so it is important to nurture the Christ that we see in them by paying attention to that and by not judging the bad unless they are open to correction.
By treating others as if they are Jesus then when the person has any issues they want to discuss they will bring them up because everyone knows they themself have problems so pointing out someone's problems to them that they already know they have with destroy all possibilities between the person judging and the person being judged for the relationship to be productive and produce fruits of the spirit.
Judgement belongs to God because he knows everything as he ought to know it .