I think it’s up to minority groups to decide what they find to be racist or derogatory. Not for people saying ‘well I don’t see racism’ well of course you don’t, because you are not in a group of people who do experience it. White people have a privilege that minority or oppressed groups do not, this is well documented throughout history through the ages across all continents and in modern day times.
In lay terms as an example If you are female you will have experiences a male will likely not have too, such as sexual harassment. If you are Jewish you will experience racial antisemitism, if you aren’t Jewish you won’t.
My partner is from an ethnic minority group in the U.K. and even I wasn’t aware of the every day low level of racism that is his every day normal until I met him. He has also experienced some more serious racism in his life that I have never experienced. Racism is also about stereotyping, assumptions and telling people they are imagining it or playing a ‘card’ is just continuing to oppress people. It’s a delusion of denial people tell themselves to scoff it back because it’s unpalatable. It’s just as gaslighting and unpleasant to try to defend it by using strange examples from your own white perspective. The U.K. is racist, we literally had an entire media and political campaign of ‘send everyone back home/don’t let ‘them’ in’ doing the rounds not 5 years ago. We have entire museums dedicated to all the valuable, indigenous items we travelled round the world and stole from different countries. At football matches, racial insults are still shouted at players. It was less than 100 years ago we were still shipping in very low paid manual labour workers from other countries such as India. Just because we don’t make people sit in a different section anymore doesn’t mean all racism has gone away. We all still have work to do, on ourselves and as a society. On one thread I won’t reference someone recently posted ‘X doesn’t even look black’ about someone who has clear and well documented mixed ethnicity background. Ask anyone who isn’t entirely white looking you know, they will have been asked ‘where are you really from?’ many times in their life. This has happened to me, from a young age as I have distant genes from native America and I am very dark haired, had hairy legs and I have almond eyes. I got teased every day for it and started shaving them from age 9. I got called all kinds of racist slurs, asked where I am ‘really from’ and the same thing happened to my daughter all through secondary school to the point where she would cry about it because even if we were ‘really from’ somewhere else, so what? Both born in the U.K., have dark features.
The U.K. was found to be racist back in 2016 in this report