X Men : First Class
SPOILER ALERT: PROCEED ON YOUR OWN RISK!!!

Lots of sociology theories inside, on minority and dominant group issues.

Professor Charles Xavier: We have it in us to be the better men.
Erik Lehnsherr: We already are.

This converstaion tells us that in Magneto's point of view, the mutants are the dominant group, though they might not triumph in numbers. However X still thinks that the norms belongs to the humans, that they should be in conformity with them, a believe of peaceful co-existence.

Professor Charles Xavier: Erik, you said yourself - we're the better men. This is the time to prove it. There are thousands of men on those ships, good, honest, innocent men. They're just following orders!
Erik Lehnsherr: I've been at the mercy of men just following orders... never again!

Here should be where the Milgram experiment steps in, where people simply obeys the orders of the higher authority, having complete obedience and discarded their own opinions just because all responsibilities would be held by that higher authorization. However, after going through years of discrimination and being slaved, Magneto refused to stay under humans, and sort of become a deviant.

Professor Charles Xavier: You know, I believe the true focus lies somewhere between rage and serenity.

Nice verse from X, but after years of being tortured by life, I doubt anyone can really forgive and forget....

Thus in conclusion, if I were to be a mutant, I would join Magneto. Humans frankly are dumb creatures that reject anything out-of-ordinary of their norms. And the cruelty of humans are so extreme, implementing their supremacy through oppression. The higher, the more power they have, the lesser empathy they have, the more evil they become. Thus Magneto is a great leader with great heart to empower mutants to have their free wills and not be under condemnation and discrimination of humankind. As I wouldnt want anyone to accept 'us' out of fear, I rather kill them all, maybe just leave the kids, kids as in babies, those without much memory, to prevent them from rebellion or grudges that we would have killed their parents...