Transform them in HerosHeroes
HerosHeroes,Idols Idols,Actors Actors,Politicians Politicians,etc etc... Lets take Captain America for example,: in the marvelMarvel universe there is a lot of prejudice foragainst mutants,. Captain America being a "super human" could be labeled as one for a ignoranteignorant person, but. Yet the majoritemajority of population do not, because they treat him as a simbolsymbol of theytheir country, government. Government made him famous through media propaganda even before he went to war and actually fightfought.
You just have to make a propaganda that mutants are cool, but. But it need to be fast before the population starts prejudice, because racism is really hard to get rid of.