Presidential Republican primary candidate Herman Cain was on Piers Morgan and the topic of homosexuality came up. Much of the discussion in the below video focused around the idea of whether or not homosexuality is a choice.
While I do like how Piers Morgan tried to make Cain look foolish for believing (or at least claiming that he believes) that homosexuality is a choice, I don't think that is where the discussion should be focused. (Also, I wish someone would inform Cain on recorded TV that the science does show that homosexuality is not a choice...so that we can see him decide to not change his opinion anyway. See the video below the line break for some of the science.) I think people should grant him the idea that it is a choice (because, again, he'll likely deny the science anyway) and then pound on him for his "biblical beliefs" pointing out that this is a secular nation and that we have a First Amendment that essentially says that while Cain has the right to disagree with that choice, he does not have the right to enforce his disagreement (by which I mean banning gay marriage) as a point of law.
The whole "Is it a choice?" debate is just a smoke screen/decoy from the real issue. The real issue, as should be obvious, is that homosexuality is a violation of his religious indoctrination. (Likewise, I'm not interested in debates about whether or not those denominations are interpreting the Bible correctly. I don't care! The only fact that matters is that they are being taught those interpretations.) Frankly, these people know that discriminating against a group for religious reasons is not legal. So they come up with excuses like "It's unnatural," "It's a choice," "Homosexuals are more likely to be child molesters," etc. to give the impression that they have a secular argument against it, though, in reality, they do not. (That last one has fallen out of favor as it has become too obvious that it's a fabrication.) For example, if you get them to admit that it is not a choice, they'll likely come up with some new justification. Much like the mythical beast Hydra, when you cut off one head, it just finds a way to grow another back. So, you need to attack it at its immortal head (or, rather, it's base/root). In this case, go after the religious roots. (And ask him for the evidence that his religious beliefs were handed down by God...or whatever he believes.)