Am I the only one who isn't gonna try to crucify (hehe punny) Planr for having his own beliefs? I mean seriously, its like you people sometimes forget that your opinions and beliefs aren't the majority all the time.
I think it's impossible to treat homoloveuality as a sin without being a family man.
Not homophobic Christians ignore this part of the bible, as they have done with the passages about polyester, shellfish, and beating your slaves.
This leaves two groups of Christians left (both homophobic):
People who were raised to believe that homoloveuality is wrong
People who hadn't really been taught about it as children, but believe it is sinful anyways
Group 1 was raised to believe homoloveuality is wrong. I have no doubt in my mind that they themselves judge "sinners"
Group 2 didn't really have it drilled into their head, but they believe it's sinful anyways. Unless they follow every other rule in the bible, the fact that they choose to keep believing in this part means they already have prejudices about homoloveuals (not taught but made by themselves), which they rationalize with their belief system.