To me there are probably four categories of chant/song aimed at individual players:
1) the type that indicates that the player is not very good and is comparable an unpleasant item, often faeces (whoooooo, you're sh*t, aaaaaah)
2) typical name calling, usually likening the individual to one of the sexual organs (keeper, you're a c*nt // the referee's a w*nker)
3) those that focus on minority issues, such racism, homophobia, etc, (you black b*****d//who's the g*yb*y in the pink)
4) those that link the individual to real world incidents, issues or behaviours ( ... Is a s*x offender)
The first two, while containing words that parents might not want little Johnny to hear, are very much part of the atmosphere at a game and the 'back and forth' between players and fans ... And those going to games should expect such things and mitigate their behaviour accordingly.
There was a time when the third category was perhaps deemed acceptable as banter, but society has changed since then so any inference that belonging to a particular minority group is a negative, or something to insult someone with, is not acceptable any more.
As for the final group, not only does it leave the individual open to potential legal issues, this is anything from unpleasant to downright offensive to most people in earshot, let alone the impact on those that have suffered either directly or indirectly from such events.
So, there is little issue with the first two, and those who aren't comfortable should perhaps take their own mitigating action by locating away from the hotbeds as best as possible....
But there is no place for either of th the latter in 2022 and those perpetuating their use need to be called out and persuaded otherwise.
Oh, and using an incredibly offensive and upsetting word or phrase " just because it rhymes...." Is quite the most remarkable justification for anything I've ever heard