I'd like to think many men want to do the right thing and make the right choices (I accept that many don't want this, but some do).
Without doubt they'll make mistakes.
In anybody's heart of hearts, they either consider others their equal, or they don't, regardless of race, sex, age, religion etc.
I believe children are born without prejudice. We as adults slowly corrupt that innocence. In the case of sexism, it isn't always conscious, but it happens all the same. If we take strides to try and prevent that corruption, others outnumber us and unduly influence children anyway.
There is so much that the human race is missing out on as a result of prejudice, including sexism. We aren't all the same as men, or as women, let alone acknowledging any differences between sexes. Our differences ought to be embraced and celebrated, not used as lines of division.
It feels impossible to change things though. Maybe it isn't impossible, but it feels it.
All men aren't bastards. We're messed up by the machine that is patriarchy and become part of the perpetuation. Grinding it to a halt is no easy task.