@shroomie Speaking purely from my own experience (I'm a retro gaming person and a doom fan from way back, although I only keep track in passing these days), your fandom is pretty robust.
Although retro games fandom in general can have a conservative streak that gets extreme in places (cough that 8-bit guy cough), in my experience there's less active right-wing recruiting there than in gaming communities that skew younger.
In the case of Doom fandom specifically, you've got a useful built-in weather vane for community sensibilities in the very visible figures of Romero (proudly indigenous, anti-racist, pro-LGBT rights, generally) and Carmack (lowkey reactionary, pally with both the "anti-woke" set and the longtermism movement).
Obviously, neither of them is any kind of political demagogue, but someone attempting to normalise far right ideas in Doom fandom would be likely to lean on Carmack as an example.