He's literally comparing the LGBT flag to nazis and communism.
My grandparents survived the nazis [...] and now some spoiled brats think I'll bend my knee to their rainbow flag.
At best, it’s a very poorly chosen wording on his part, and I don’t understand why you feel the need to pretend otherwise. It doesn’t mean he’s entirely wrong about the whole situation, but what do you think the average gay person would feel when they visit his Twitter account and see this pinned tweet? I just don’t understand why alienate some gamers who might otherwise play this game and have nothing to do with the controversy.