Yep. I'm Hispanic and you can't split that from my identity. Take that away, make me Caucasian or African-American, and I'd be a very different person. Being Hispanic, and the specific nationality which my family hails from, makes up part of who I am. My ethnicity, race, and nationality are not interchangeable with any other ethnicity, race, or nationality.
The notion that you could take Scott Summers or Hank McCoy, make them African-American, Asian-American, etc., and declare that they'd be the exact same character, is completely ludicrous. They'd be different. They'd have to be different. They'd be written different. In which case they're not the Scott Summers or Hank McCoy's which we want to see onscreen. They're new characters who just had another character's name slapped on them. In which case, what's the point?