Fair enough.
But this was never about being offended and that is the point.
I doubt any of us cares a whit about what other teams supporters sing or even about what individual supporters say in their cups on social media or other.
But this is why you have to look at the matter from a political and cultural perspective.
This supposed 'non-concern' is being used maliciously and for gain, not by you against anyone, but by nasty people against you.
Not to offend you on a personal level, but to undermine your very being on a political and cultural level.
To diminish you as a person in society and to traduce and eliminate any influence you have at a cultural level and even at a political one.
It is a war, not one that you declared, but rather one that has been declared against you.
You can hide from it, you can stick your head in the sand, but it will still be the same.
You are the target and they are aiming at you no matter how much you decide to look away.