I disagree it’s racially motivated - but I support her right to post the pic and she shouldn’t have been fired.
I will point out, however, that Facebook would normally have automatically banned her if she had done that to a Democrat candidate.
I’m sure that as a flight attendant, Delta has language in it hiring and retention policies against acts that could portray Delta in a negative light or affect business. The racial equivalent of “moral turpitude” if you will...