Answer by Kris Rosvold:

Sadly, no.
Science has already "proven" (more accurately, demonstrated that being gay is most likely, based upon reams of evidence and many dozens of repeatable observations…) natural to animals, which humans are a subset of, and most likely has a biological basis.

Here is some of those reams of evidence presented in layman's terms, for your review:
http://en.m.wikipedia.org/wiki/List_of_animals_displaying_homosexual_behavior

http://news.nationalgeographic.com/news/2004/07/0722_040722_gayanimal_2.html

http://www.bidstrup.com/sodomy.htm

Here's a slightly more technical look at it:

http://www.yalescientific.org/2012/03/do-animals-exhibit-homosexuality/

Since homosexuality occurs naturally and almost universally across the animal kingdom  and humans ARE animals Occam's Razor implies that this is natural and normal for a percentage of any animal population (including humans.

Now, I'm not gay and frankly don't /can't understand that attraction. On the other hand I don't understand those who link pain and pleasure, those who want swinger relationships, or those who enjoy eating tripe, Fugu, or Lima beans. Does any of these behaviors make them any less a "normal" human.? No.
Will that change hatred by zealots? No.

Would homophobia end once and for all if science proved that homosexuality had a biological base?