Magneto eventually believes that his oppression is a misplacement of the natural order and that his mutant ability actually grants him natural supremacy. He believes in and acts on the basis of racial supremacy, ultimately inheriting the beliefs that caused him so much suffering earlier in life -- the key difference being that he has unprecedented power afforded by his mutant power to enact it. He operates on the assumption that by exemption of mutant status, you are inferior and deserve lesser station in life. He's not Malcolm X-like as many seem to try and figurehead him as, where he believes in no tolerance for oppressors and believes that you can only maintain your dignity by confronting your oppressors directly (as some have said, that's 2010s Cyclops) -- he actually believes that the people who challenge him are doing so from arrogance, and an ignorance of a perceived natural order that places mutants above all other beings on earth (and perhaps in all of existence).
Stryker is basically just Christian puritanism, and he seems to mostly operate from the ideal that basic humans that swear allegiance to God and his specific interpretation of the bible are the only way to be pure, moral beings and that all deviations are outside of and against the will of God. He's a fearmongering Bible zealot.
In any case, flawed as Xavier can be as a person, his belief is that all of humankind, mutant or not, is deserving of dignity, and he at least acknowledges that mutant power can be used as a force to defend the dignity of ALL of humankind, and with the established social order (in real life and in comics) constantly reinforcing everyone's differences (especially in a negative sense), sometimes especially the ones that seem to drive the idea of disadvantage across racial, social, class, national, religious differences, this philosophy tends not to have a lot of concrete evidence to stand on. Disadvantages DO exist for all the wrong reasons, but Magneto just believes in that himself, he's not doing shit to improve the situation, he's just flipping it and keeping it going. Magneto still plays "us vs them."
But "Magneto was right" basically just affirms racism, so imo get outta here with that shit.
