When the nazis came to power, they forcibly took away the guns of their victims. They’d send a squad of SS to your house, surround it, and force you to give up the gun. If you didn’t, they’d kill you, if you did, they still got you in the end.
Some of their victims hid, refused to give up their arms, and fought back. They didn’t survive.
If guns were the answer to dealing with fascism and authoritarianism, germany never would have had the holocaust.