Because as is repeatedly the case the writers for the films are morons. They used the same writer for Last Stand [the first shitty Dark Phoenix film] as they did for the actual Dark Phoenix film.
Alternatively someone didn't want Jennifer Lawrence being having to deal with the mother plotline despite the fact First Class even had Nightcrawler's biological father, Azazel, in the film as a minor character. You know, the red, Nightcrawler looking teleporter.
Very few, if any, superhero movies ever bother to actually go further into the source material than a film/comic title and basic premise so it's not really surprising at this point how badly some of the more nuanced topics are either skipped over or totally contradicted.
Because as is repeatedly the case the writers for the films are morons. They used the same writer for Last Stand [the first shitty Dark Phoenix film] as they did for the actual Dark Phoenix film.
Alternatively someone didn't want Jennifer Lawrence being having to deal with the mother plotline despite the fact First Class even had Nightcrawler's biological father, Azazel, in the film as a minor character. You know, the red, Nightcrawler looking teleporter.
Very few, if any, superhero movies ever bother to actually go further into the source material than a film/comic title and basic premise so it's not really surprising at this point how badly some of the more nuanced topics are either skipped over or totally contradicted.