After reading, I'm not sure what to think. I do not have the subject matter familiarity necessary to take a position on his claims, nor does he cite anything other than personal experience and his own research.
If his historical claims with regard to homosexuality are correct, then I can say with great certainty that his other claim as to how these facts will be interpreted in the modern climate is distressingly right.
Worth noting that he takes no position on the rights of homosexual couples. The only value judgement made therein is that (assuming the information used to reach this conclusion is correct) that historically, homosexuality been associated with some pretty ugly and downright evil things.
If they're not correct, then this amounts to a very, very disgusting and ugly smear piece worthy of groups like the infamous Westboro church.
So now I wonder.. which is it?
If it weren't for the Eich/Mozilla thing from a few months ago, I'd have looked at these claims a lot less skeptically coming from a technologist who's intimately familiar with logic, and who would necessarily place facts above all else when it comes to arguing a point. That's not a thing I can do anymore, especially considering the tendency of actual bigots to couch their own personal prejudices in superficially-correct-sounding scientific language.