Hey, we understand that not everyone has the time to follow the game industry so much that they'd catch all cases like this or time to look into developers making the entertainment they consume. In case of stuff like movies & games that nowadays have hundreds & even thousands of people involved, it's not even impossible or reasonable to expect to check all that up (though we do know official stances of big companies, like EA has a very open transgender & gay supporting stance, so they are good in that regards, at least).
But here is a case where you can't feign ignorance anymore. You came into this thread and now you know these people support a group that has systematically harassed & threatened women, gays, people of colour, muslims, transgender people and people who stand by them. So if you buy this game, you either don't care about the blight of others just because OMGZ GAME SO PRETTY or you support GG's ideals, none of which are a particularly good look on you. You can't go back to "hey, I can't know the political stance/hate group supporting status of everyone involved and thus I just buy games that look interesting" after coming into this thread. This is at least one case that you CAN now make an educated decision of buying or not buying a game with, based on the devs openly admitted bigoted views.