I am very critical about a lot of stuff from the Krakoa Era, but I will give Marvel this: They have made a good job giving depth to the villains... I mean, I expected Dr. Stasis to be some generic racist mad scientist, and when I learned he is a Sinister I thought "this is even worse!", but now I think they have made a good job creating him... he is still a villain, but he seems to have his reasons, both ideological (probably something along the lines of "Mutation is disease, and mutants are purposely spreading it and preventing attempts to cure it!") and personal ("they have that insane rogue clone who is a threat to all life on Earth in their Quiet Council!").
Feilong is pissed because they took from him his reason to live, and because mutants have taken the stars from Humanity; Dr. Alia Gregor hates them because her husband's two deaths; Nimrod hates them because they took his humanity from him; Omega Sentinel is an agent of the machines from the future; Killian Devo thinks he comes from future when mutants have enslaved humans; Moira feels betrayed...
In a way, their motivations feel more human than the heroes'...