As I said earlier, it is not the person that is seen as the sin, it is the sexual act of homosexual that is what religions say is not a right way.
In spirituality they always say "never blame the person when he commits violence against others, but you can blame the act"
But this time you take it out of context, and put it in the wrong context, and misconstrue things; totally messed up
The gay person does not hurt others by his act, hence the above spiritual advice won't fly
Because when you condemn a personal feeling of a person, you do condemn the person, esp. knowing that he hurts nobody else
Anyway, it is none of your business to judge the feelings (you can't separate feelings from sex) of others.
IF you want to tell a gay person his sex act is a sin THEN you should tell all the straight persons that their sex act is also a sin
Good luck with that