Look at the results of that 90s LA bank robbery. It was the first time that two guys had enough body armour and firepower to challenge the local police. What was the end result? Every police officer across the country getting assigned body armour and high powered rifles, and every police agency militarizing and buying APCS, tactical units, etc.
The idea that the government would allow you to own weaponry that would legitimately challenge them is asinine.
Bruh, come the fuck on. Jews were 1% of the population, meanwhile like 30% of the population actively supported the Nazis, and far more would have continued to turn a blind eye as long as violence wasn't being perpetrated against people like them.
This is nonsense alt history that ignores the fact that Nazis steamrolled and enacted death camps in far more countries than just Germany, and personal ownership of firearms didn't make a dent in stopping them.