I'm Polish and I have a pretty good understanding of local politics, so just to clarify the neo nazi angle.
Yes, dude probably hates a lot of minorities (that's tl;dr; for you). Żołnierze Wyklęci were anti-communist underground paramilitary group and their symbolism was adopted by Polish far-right groups some time ago (so don't take on the face value what's on his t-shirt - there's a context behind it that Wikipedia won't give you). This t-shirt can be e.g. bought on "Red is bad" page which (no surprise here) is anti-communism e-store. CEO's FB page and his t-shirt clearly pigeonhole him as a radical right wing. There is a high probability that he doesn't like with a different mindset to his own (they are commies, obviously), minorities (be it ethnic or religious), is afraid of Muslims taking over Europe, Jews taking over the world, blacks having rights, gays making his kids gay, and so on. Or he may be less looney tunes than that - I don't know him, so I can only guess.
Having said that and being as far left myself as probably humanly possible - I think it doesn't matter at all unless this influences the game. Which we don't know if it does or does not. Game should be judged on its own merits, not through the lens of its creators. And rest assured, with AAA games having 200+ people working on them, there has to be a bunch of people with POV different than yours. Probably very much different, repulsive even. The only reason you don't toss, say, Epic Mickey aside despite the fact that a bunch of artists or developers behind it are hardcore anti-something dudes is because you don't know that. And you don't seem to care most of the time.
Not knowing people behind a game gives you this nice, comfy cushion of not thinking about the ideology of its creators. Same goes for excuses games give you for killing a truckload of enemies. These are simply cushions for you to not think about your actions. This game is very much in your face. Developers probably shouldn't be this proud of themselves but it's part of their business sense (or lack thereof) and will be validated in the long run by their ability to fund and create another game in the future.
It is somewhat troubling that CEO associates himself with fringe politics. But so does Chuck Norris and Steven Seagal and you grew up watching their movies. This didn't affect you but somehow this game will? Maybe, but I'd rather wait and see.