That is a fairly offense comment in itself Palestinians very existence and considering them living breathing humans promote antisemitism? Are we being for real?
If they really need to change his origin (Which personally I don't think is necessary) making him Palestinian is perfect only to challenge this type of absurd thinking. And your comment is a perfect example of why it fits perfectly with the mutant allegory so well.
In fact it's actually incredible that there hasn't been a Palestinian mutant given the story potential. Although I guess the shift has only been recent where there's a shift in demographics in the western world the majority of younger people (18 to 25) are starting to see them as human and favourably (Source YouGov and Gallop)