It's definitely an example of hypocrisy. To put it in prison terms, OKC is pursuing punishment rather than rehabilitation. If you're really about bringing people together and love, then you should be promoting trying to change peoples' minds to make them more inclusive, not blocking them altogether. Being hateful back at them simply reinforces their beliefs, and gives them a martyrdom story to pass on to like-minded people: "they say they're for love, but declared me an enemy and wished me failure". Making enemies of demographic groups divides people, pretty much by definition.
Our most brilliant scientists have recently discovered that the word "love" has multiple overlapping definitions. Strange but true.
What about "we’ve devoted the last ten years to bringing people—all people—together"? How do you hand-wave away that comment of OKC's in a manner that still allows them to be divisive?
That's not to defend okcupid's tactics in this case. I'm just saying that it's not really an example of hypocrisy.