Sooner or later, Christians will have to make a choice:
Once it's scientifically demonstrated that sexual orientation is largely genetic, homophobes will be at a crossroads. They can either hate someone for who the person is, and continue in homophobic bigotry regardless of whether a gay person had any choice whatsoever in their orientation...or, homophobes will simply dismiss the science as bogus and claim it's yet another big scientific conspiracy/fraud right up there with evolution.
But believe me, that day is coming. And sooner or later Christians will either need to accept the obvious, or hate millions of people simply because of who they are. A lot of people have already accepted the obvious, but once science locks this subject down, the debate will officially be over.