> You can't decide to stop being black, but you can choose to not buy an iPhone. That's why race is a protected category and your smartphone is not.

There are protected categories which person can choose to belong to. In USA these include for example religion. In EU political beliefs as well. So would it be okay to start suspecting anyone who is Christian if some Christian committed crime? Or anyone who supports AfD if AfD supporter committed crime? You can always choose to stop being Christian or AfD supporter.