Well, he did try to subjugate humanity. At some point. There's no actual on-panel proof of it, but folks working for Marvel say it happened.
LMAO. That is all.
It goes beyond that. I mean, how the heck could one forget/not know of Cyclops' plan to make sure everyone on Earth would eventually have two meals a day and a roof over their head? Heck, that's the entire reason why Hope defected. Cyke denied her the Phoenix because he was too busy trying to help non-mutants. So she beat him up, shut down his non-mutants-helping initiatives and, huh, restored mutantkind...?
Clearly, this is about Marvel not getting the memo on how folks can easily spot fake news in 2019. Oh well. Rude awakening and all that.