UK did some dark shit in the past. No debate.
Brexit is a whole different topic. Norway isn't part of the EU, does that mean they are racist? You can hopefully see how weak that point was. Part of the debate was about sovereignty and economic decline. Whether valid, your implication that because 17m voted for that, they are all racist, is wholly wrong, shallow and child like black and white thinking. Some are, yes. I do know folks from right or left year voted for it who don't have a racist bone in their body. You have to be able to handle nuanced debates though.
You've completely changed the topic from slurs and what isn't acceptable to a whole piece on racism and I think every country can do an awful lot more to improve, UK included. The point was, slurs in there that some are finding acceptable in other countries isn't here. You'd get banned from football games for them or fired from jobs.
If you just want to go down the "UK all bad!" You can carry on the whatabouttery/kitchen sinking on your own to make yourself feel better to protect your country and feed that nationalist indignation you got going on. If you want to go back to discussing slurs and acceptability, happy to welcome you back to the debate.
You have missed the point completely. UK isn't good but even given how bad you think it is, doesn't tolerate the slurs mentioned (the whole point of the post). I speak about it because I live here and I'm shocked people even debating that these words are fine.
What miraculous country are you from that is so free from racism?
In a nutshell, I've said these words not cool here and your contribution is effectively "your racist country is so bad. Don't talk". Not the most helpful contribution ever. Who hurt you?