Scripture. Do you understand that there are as many interpretations of "scripture" as there are Christian religious groups on the planet? So which one is the True interpretation? None of them but of course ALL of them believe their way is the only "true" way and this is why wars are fought and this is why human beings are damaged by Christianity.
The ones that hate are just as erroneous as the ones that "love". This being the case, no Christian group - not one - has the right to push their beliefs on to other people.
If you didn't hold yourself up as some kind of superior moral guardian you would let homosexuals, lost or otherwise. The kindest thing you could do if someone came to you in confusion over their sexuality is to say "I'm sorry but I cannot help you" and give them the phone number of their local Gay and Lesbian Centre. You won't do that though, will you and why? Because deep down you think you have some kind of "truth" for these people and that is evidence that you are exactly the same as your brethren Falwell, Phelps and Sharpton.