That quote reinforces Xavier's dream of fighting for peaceful coexistence, it says nothing about approving what Krakoa's doing. It's about America embracing full equality, not domination or separation. He didn't support segregation.
https://www.scholastic.com/teachers/...uther-king-jr/
"I could never adjust to the separate waiting rooms, separate eating places, separate rest rooms, partly because the separate was always unequal, and partly because the very idea of separation did something to my sense of dignity and self-respect." –1958
"Segregation...not only harms one physically but injures one spiritually...It scars the soul...It is a system which forever stares the segregated in the face, saying 'You are less than...''You are not equal to...'"