@Desert Gyrfalcon,
Let me start by saying that I have made this argument against Christianity, so I am not arguing solely against your faith.
The way I see it, the religious texts that so many people in this world hold sacred are written by man. Man is fallible and corruptible. Therefore, while these texts may be attempted guides to living a decent life, in my opinion they should not be looked at as some "divine law".
Since there is no concrete evidence to the contrary, I think that God has never come down to talk personally with anyone on this Earth. Now, I'll acknowledge the fact that I may be wrong, but I won't find out until I die, and even then that's only if there is an afterlife in the fist place. Having said that, any stories of prophets who claim to have spoken with God may as well be, in my opinion, fictional.
Thus leading me to my point:
The authors who wrote the religious texts that so many people hold sacred may have written that homosexuality is a sin. However,
because the "sacred" texts were written by man, the listed sins are from the
opinion of the
authors, and not that of the deity(-ies) they believed in.
Again I could be wrong, but I won't know until I die.
As a side note, as far as "crossing the line" goes, in my opinion your stating that homosexuals should be stoned to death crossed my line, as well as probably everyone else on this thread who is gay or knows someone who is gay.