I see that you are choosing to read it that way, but that is quite literally not what he said, and I don't agree with the assumptive leap that you took to get there. Is it possible he meant it the way you're choosing to interpret it? Of course it is. But it seems at least as plausible that he didn't (the fact that he said 'that' and not 'them' means he's probably referring to some sort of dogma or indoctrination or messaging, and not people), but you - and the author of that article apparently - are choosing to go with that particular interpretation anyway. If you can't see the rather large assumption you're making, to me that's a far bigger problem, because it all but guarantees a state of perpetual aggrievance.
Regarding the other stats, that is actually committing the common follow on mistake of lumping everyone together as the same. Again, let's pretend this rando really meant things the way you're choosing to interpret it. To go from there to implying that he is equivalent to everyone who is not on board with gay marriage is again a huge (and false) assumption that only serves to ratchet up your frustration / anger / whatever towards people who don't see the world the same way.
(And as an aside, if you are truly interested in making further progress on some of these issues instead of just being angry about them, you need those people as your allies and could probably win many if not most of them closer to your POV, but demonizing them by lumping them in with the tiny minority representing the worst of them all but guarantees that won't happen.)