This question is going to need a couple of clarification.

Firstly, I am talking about men who, for some reason, are uncomfortable with the gender role imposed on them. I have noticed that most of us, on both sides, are (and I do not intend this insultingly) far from the masculine ideal an many struggle with dating. It also seems like autistic traits are far more common among us than the general population. What I am getting at is, outside of arguments over feminism, we seem to be similar sorts of people. The manly men who fit easily into their gender role and were popular in highschool tend not to have much reason for engaging at all in this discussion.

Secondly, assume the best possible faith in your ideological outgroup. I'm not looking for "because they don't actually care about men and just want to (take away women's rights/impress women with how feminist they are)." I'm interested in why people who genuinely see something wrong with how men are treated by society and want it to change end up entrenched in such different ideological camps.