Talking about it afterward with my roommates, we figured out a half-dozen reasons why the film, in no way, supports Xavier's point of view. All of them boiled down to privilege. As if it weren't enough that he is a cis-gendered, rich, handsome white dude, he's a cis-gendered, rich, handsome white dude who can read minds and has no physical tells to his mutant power. He can preach the "surely we can just get along!" message because he's at liberty to do so: he can pass (and literally change minds if necessary).

That's pretty weak sauce against a man who has lived a life that proves what a lack of privilege will do to people who are different and whose philosophy is proved correct in the film itself. Magneto says, "They're going to kill us," and the humans promptly try to kill them. Xavier's way not only seems like a luxury most mutants won't have, but, in light of the ending, a delusion.