The 'perversion' thing, there is compelling data to suggest that homosexuality arose as a means to curb population expansion, there are already 7bn people on the planet, how many would that be if same sex attraction didn't exist ? It is estimated at around 9.5 billion, so as an evolutionary strategy it seems to work.
Well, here we're back into the realms of unprovable, entirely unscientific conjecture. It's well known that the planet could feed / support hugely more people than we currently have, with only current technology and agriculture; even supposing "evolution" as you think existed (and let's not bother going there, as we're almost certainly not going to agree on what the term even means, never mind whether it might have a strategy)... It's still a perversion from the clearly designed norm.
A lot of the rhetoric seems to be grounded in fear of change, there are far bigger and more immediately threatening things to your everyday life to get wound up about than whether a couple of women or men get hitched.
Quite. But even so, the thing is, that's not actually what people _are_ bothered about, as such; rather it's clear (even from some of the comments on here) that this will not stop there; many people who hold the belief that such things are improper will find themselves, sooner or later, up for prosecution or at the very least lose their jobs. It's already happening; this is not really the thin end of the wedge, but a still thicker part. There is no tolerance being shown whatsoever; the homosexual lobby will take the slightest sign of dissent, even a perfectly reasonable facebook comment, claim they're mortally offended and throw the "bigot" who dares to disagree with them to the lions.