My wife is Jewish. Both my grandfathers served in the US Army during WW2. I have many friends and co-workers of various racial and ethnic backgrounds. You wouldn't guess it by looking at me (I'm a pale white guy), but going back several generations I have Native American blood on my father's side. I could probably be considered left, if not "far left" in my political views on virtually every issue. Simply put, I fucking hate Nazis.
But I also very much dislike McCarthyist-esque blacklisting. So if you're going to call someone a Nazi and treat them with the disdain that a Nazi rightly deserves, you have to be damn sure. RPGCodex has a troll as their mascot for a reason. It's very hard to take anything anyone says there seriously (beyond whether or not they like a particular RPG). I have an account there but am not nearly as active there as here and steer clear of political discussions. There is certainly a conservative / right-wing political tendency there, just as there's a left / liberal slant here… Or as I generally describe it, "RPGCodex is a site where the members have pretty great taste in video games, but pretty much lack taste in anything else". I have a pretty dark sense of humor myself and often politically incorrect, but I also don't find racist, homophobic, or sexist jokes funny. But you know, I can watch and laugh at stuff like South park and often make morbid jokes about wanting to kill someone I find annoying..
Anyway, I skimmed JarlFrank's reddit, but seemed to mostly be posts about writing and RPGs… Saw one thing about Fascism. I don't know… I appreciate what Hobgoblin said in the news thread. It's possible the guy just has a whacked sense of humor or maybe he actually holds some disgusting views. He's probably very far to the right of someone like me, but a Nazi? I don't know, can't say I've ever really paid much attention to him before today.
So to the question at hand. I buy games because I support the game as a form of entertainment (or art) that I enjoy and want to see more of… I generally don't know the political views of the developers / artists I support, nor do I really care much, because it's the artwork I'm supporting…
If this game looks like something I would enjoy, then I'll likely back / pre-order it because I want more RPGs like it to be made…. To be honest, this rumor has dampened my enthusiasm somewhat, but as long as I don't get a sense that this game has an sort of overtly bigoted themes* (which would certainly be a dealbreaker for me), then I'm comfortable that a small chunk of my money goes to someone who might have some really gross personal views. You can always hope that someone changes and grows as a person through life experiences.
*And I am sure this will not be the case. Hobgoblin42 seems like a really nice guy (been following and interacting with him since the Chaos Chronicles days) and Guido Henkel is definitely not a Nazi sympathizer (just look at his twitter feed
I totally respect the viewpoint of anyone who doesn't want to support a developer / artist who has abhorrent views, I just don't necessarily agree with that. Do what feels right for you, of course, but I'm going to do what feels right for me.