I think you make a reasonable case.
I don't think so. His (or her) response has been over the top emotionally and suggests a personal bias that has not been disclosed. I don't think we have all the facts about the bias yet. Full disclosure would help.
Black Muslims are not overly fond of Israel or Israelis, and that may be a factor that led to the discrepancy. We would have to ascertain that the woman with the apparent Arabic first name (the one with the other employment lawsuit) is in fact Moslem, and if she, in fact, reacted differently to this Wizard customer, and treated him differently than she did other customers.