He won't have a place at real madrid fans heart.
You know what? The pain is too heavy after the last season betrayal , he is the player-manager at psg tho so no matter how everyone hate him in the club , he has that power to demote anybody which yeah it's kinda awful but he has that capability. Mbappe will stay at psg for very long time for me and real madrid will a bit hard to find the same quality player in the future.
Real Madrid fans may still be hurt because Mbappe refused Real Madrid offers in the previous transfer window.
But if Mbappe can show his good contribution to Real Madrid then, all the fans will respect and appreciate him. I am sure that Real Madrid fans will be happy if Mbappe helps Real Madrid to win La Liga title or UCL title this season. Real Madrid fans hate Mbappe because of the failure to see Mbappe be a part of Real Madrid squad. If Mbappe really comes to Real Madrid, all the fans will try to forget their hurts.