The Lyons Brotherhood of Steel's fate *Fallout 4 spoilers*
But yes, I think it's interesting how the Brotherhood of Steel in the game is vaguely unsettling in a way which contrasts against the grossly Caesar's Legion and Enclave. You have the genocide against nonhumans, the authoritarian power structure, the cult of personality around Maxson, and the "purity" tests like "Have you ever had sixual relationship with a nonhuman" all are vaguely reminscent of Nazis.
In the same way the Enclave and Warhammer 40K Imperium is.
However, they're JUST far enough away from them that it's all subtextual rather than overt and in your face.
After all, plenty of people wanted to join the Enclave in Fallout 3 under Colonel August.
This is as close as you're going to get.
They just consider Wastelanders "human" unlike the Enclave.