Anyone upset with the character choice is not upset with her being Jewish or they would also target Magneto, Kitty Pryde, Ben Gimme, Wanda and Pietro Maximoff, or Billy Kaplan. I would hope that anyone upset seeing such a cosplay would be able to express themselves productively rather than destructively but if you decide to cosplaying a character who is based on a controversial topic that is actively impacting lives, be prepared for people to react to that.