If it’s all just an allegory for racism, it’s definitely not great. “I can’t touch other humans without killing them” isn’t some stereotype or metaphor for discrimination, it’s just a literal disease. She was basically born as an asymptomatic carrier for ebola. What the hell does that have to do with race?

I agree as a disability allegory it’s better, but still off in this scenario. They are just too capable/cursed for it to be an appropriate metaphor. Storm lecturing Rogue would be like Daredevil lecturing a random blind person not to get eye transplants because they’ll hear better if they live without eyes. It’s pretty messed up.