Don't downplay how it used to be, before the anti-discrimination laws.
I hope the backlash against "PC" doesn't mean kids suffer like I did:
I was the first ever non-white kid at an English rural primary school in the 1960s, nice respectable prosperous village. No unemployed or homeless there, so no excuse that "furrin" was harming their lives in any way.
Sheer misery.
I hated every single day of school.
I was subject to racial insults most days - being surrounded, pushed about and called "wog" by the other pupils.
No rules about non-PC language in those days.
Teachers only intervened once in 4 years, when it was so loud the headmaster could hear "Wog, dirty wog" in his study.
I was totally excluded socially, no friends. Very rarely allowed to join in the playground games.
The other kids had party invitations, exchanged Xmas cards every year. In my 4 years there, I received only 1 invitation to a birthday party and that was a pity thing by the parents, because my dad had just died.
Worse of all one teacher was racist, fortunately only 1 lesson a week qith her, but I dreaded it because of the spiteful criticism and smacking - that was allowed then.
I didn't dare speak in her class, so she invented insults to smack me. Once she sent me to the head for caning. I had done nothing whatsoever, except be non-white.
That's what happened before discrimination was banned, when people had absolute freedom to say what they wanted.
Long before the internet, so those kids copied attitudes from their parents & neighbours.