I understand what you are saying in your last sentence, and I am not equating. I am pointing out how we have to judge the actions of people as right or wrong, not the people as hell- or heaven-bound. I don't hold you or other non-Christians to the same standards as a Christian anyway. But you must understand, as a non-Christian you are not bound to live by Christian commandments, but neither are you really in much of a position to interpret them any more correctly than I.
Am I wrong to believe that homosexual acts are wrong? For you to make such a call is, in fact, judging my "sin" (even if you don't believe it's a sin per se). But are you judging me as a person because of that? Well, if you are using merely a moral view to justify calling me a hateful person (*cough*hairy_hen*cough*), then yes you are. But if you are merely thinking, "Wow, he sure is ignorant on this topic, and thinking that a sexual act between consenting adults is sinful is a sure sign of his ignorance," then I think you are merely "hating the sin" (of opposing homosexual behavior) without hating the sinner.