Yeah, it's also misogynist, but it's not the bad sort of racially coded misogyist slur, so it's low-status to complain about it or even acknowledge it. Hence the comments pretending not to know what you mean or implying your racial politics are suspect.

Ummm... Wat?

It basically means 'I hate white women' but that's ok because they are white

The Karen meme is about white women leaning very hard on their white privilege. And every time you say the words "white privilege" someone somewhere will play a reverse racism card.

That someone is you, you are the one to mention it.

If you think racism can’t be applied to some people because they have magical immunity due to their skin color, you’re a racist.

Privilege plus power. If we can't agree on a definition, substitute my word for another that more closely fits the meaning. I don't care to bicker about definitions, but I hope we can both know what is meant.

This is one of the uppermost citations on the Wikipedia page for the term.

https://time.com/5857023/karen-meme-history-meaning/

"Marginal immunity" is also looking at it the wrong way. One should instead consider how a nonwhite person would be treated in the same situation. Let alone any incident involving the police in the US.