I'll take a shot but I'm not a die hard X-Men guy. If someone has a little more precision please correct me.
Basically magnetos driving idea is that people (and their governments) are out to get mutants and won't ever change, so it's up to him to lead mutants to fight back. Basically if they want respect and fair treatment, they have to take it for themselves. He tries many times in many ways to pull down the establishment by, for example, attempting to convert all people to mutants.
The premise of the post is basically that, since Reagan, social support is diminishing and power and wealth are concentrating in such a way in the upper class. Ergo, taking an... uh... active approach in advocating for ourselves is looking increasingly like a good idea.