Title? I don't need no stinkin' title.
What I'm saying is that any number of words can be considered insulting if you want to consider them insulting. Describing a campaign where walking into a bar it looks like Mos Eisley's Cantina is just something that gives an immediate picture to the vast majority of people.Are you saying that a "cantina" can't describe a tavern full of humans? It's a human word originating from a human language to describe a human environment. We don't have many words for diverse groups of sentient non-humans.
(Species is no more offensive than the others, IMO. It's silly to be offended by being called a group of different species' if you're literally discussing a group of lizardfolk, kenku, tabaxi, and elves.)
I don't think that's insulting, it's just using a handy dandy easily recognizable reference. Have some people interpreted it as an insult? I guess. Some people get insulted any time you have even the most minor of disagreements.