Oh you are being violently sexist, you just dont know that yet.Associating a large group with some negative traits is definitely some form of-ist. As that relevant large group is men who got that identity from their gender, that makes you sexist. No amount of mental gymnastics gonna change that. Not much to discuss with some sexist person now in the 21st century
youre actually being sexist. even if some men are like that doesnt apply to the vast majority. taking a stereotype/anecdote and generalizing to a large group makes you -ist of some sort. in your case - sexist. for nazi germany - racist