Welcome to America. Don't look the crazies in the eye, they'll start preaching Jesus if you do.
But... there are several quotes in the Bible that are at least arguably actually against homosexuality! Why would you pick a completely irrelevant one?
take "You shall not lie with a man, as with a woman. That is detestable."
Remember at the time Women were basically property, almost like cattle.
So maybe what it really means is that when you 'lay' with men, you should treat them with respect, as a fellow man; and not just use them, like with a woman/sheep.
Also, how should Women read that command?, Are women banned from having sex with men, or at least not like they lay with women?, does that mean the bible specifically OKs lesbians?
Uh, far simpler explanation: Women were property in the bible. They pretty much didn't matter, and if you were a girl it was an extra special bad sin not to obey your father or husband. Really, the whole book is gender biased from Eve right on down.
As for why he tried to use that quote, cause it was said by Jesus, who you know, seems to be a big deal and people know him or something. I guess it just holds more weight. Fact is, he didn't say anything about it, but truth doesn't seem to stop the particularly crazy ones. The guy quoted here is actually talking about laying down his life for his friends, which has nothing to do with anything in this context, but then expecting a fundie to make sense just ... is a waste most of the time.
At the end of the day, this was somebody who was pissed off over any support of homosexuality. And, you know what's sad? A few years ago, that kinda thing would've worked. It would've massively worked. Opposing a company for supporting gay rights 10 or 20 years ago (and especially further back) would've been a totally legit strategy and very, very effective. These people are at a total loss as to what to do now that this old trick isn't an automatic win. It used to be all you had to say was "Gay? Ewww." That was the end of pretty much anything that had to do with gay rights getting any serious support until very recent times. With several people today, it's still all they need to 86 something. The notion that gays fit somewhere, anywhere into a family and [fake gasp] a family with children... is unthinkable to many in the US today. That's part of the reason why all the anti gay groups are "family" or "traditional marriage" groups. My response if only I could say it, "You don't wanna talk to your kid about it? So your solution is for me to alter my entire life because you can't have a conversation with your brat? Yeah, well I don't wanna live in a world where I have to explain to anyone not to wear socks with sandals but here you are...."