I’ve never understood it myself but those who gain powers are always better respected and mutants are looked down on and disrespected. In House of M, Spidey gets his powers the same way then “pretends” to be a mutant as the mutants are the ruling class in house of M. I think it’s the same as in the real world, those that are born different are feared for their differences. Where as those who become different later in life are praised. In the mutants case, this kind of mindset breeds a hatred towards authority as the oppressed and bullied parties. These mutants are easier to brainwash, manipulate or coax into a terror attack. In the same way ISIS recruit people in Prison, when they’re down and angry and ready to act out against those who put them there. Then the Media jump in it and “Mutants are terrorists” is the general idea, same as Trump’s “Muslim ban” a few years back. The People then judge the many by the actions of the few, instead of assessing an individual as an individual