You'd be surprised how forceful X can be in the defense of the greater good. After all, he could erase your self identity from reality itself and remove those instances from your own mind... In fact he could have recalled Darius back into their little meeting by erasing the moment he teleported out from the memory of the universe. It would be like Darius never teleported to everyone but X and the creator. Then remove his knowledge of how the spells work to prevent Darius from repeating the process...

X is secretly most likely a super villain.