I'm looking for a word to indicate what someone is doing when they're regularily targeting anyone part of a different group / community using words and without physical actions involved, something like "to persecute" but with a lighter acceptation.
A good example would be supporters of a football teams (?) supporters of other teams; they're not "persecuting" each other, but if they meet they'd start (?) each other, so the topic is the rivalry here; nonetheless this wouldn't imply physical actions of any kind, but just words.