When you took your oath of office, you placed your hand on the Bible and swore to uphold the Constitution. You didn’t place your hand on the Constitution and swear to uphold the Bible.
This jerk is getting a ton of press coverage for his “medical” objection to homosexuality and gay marriage, saying that anal sex is harmful (his stance on same-sex marriage between lesbians is unclear, but presumably he’s okay with it? Somebody should ask).
He’s also trotted out a subtler and more insidious attack on homosexuality, referring to it as a “genetic breakdown” like cancer. It’s insidious because it has a grain of believability, because homosexuality doesn’t seem to be an advantageous condition, in evolutionary terms — it predisposes the individual to relationships where reproduction is impossible. So why does homosexuality exist? Maybe it’s just a genetic problem, like cancer?
The fact is that we don’t know why homosexuality exists. But we do know for sure that it can’t be a genetic error, because homosexuality is far more common than any genetic disorder. Something like 2-4% of the population is homosexual, but individual genetic disorders are vanishingly rare, seldom cracking more than 0.1% of the population. In fact, at 4% of the population, homosexuality is almost as common as all genetic disorders combined.
Whatever the evolutionary advantage of homosexuality is, there must be one, because otherwise evolution would have weeded it out a long, long time ago.