That's a common misconception. Through an understanding of the Scriptures and a belief that they are true, it can be predicted that certain people are going to hell, not because of who they are but because of what they have not done, which is accepting the offer of salvation. Although I may recognize that an unrepentant sinner is going to hell, I am not condemning them to hell. I am surely not the judge, and I'm not even on the jury. When someone commits a serious crime, I might predict that this person is going to jail if he is caught and convicted but unless I am called to be on the jury, I don't have a part in that sentence.