Accepting the US version of "Karen" handily erases the fact that UK misogynists have been using it against black women and working class women.
I think 'Karen' and 'Becky' were first used by black women to refer to racist, white women, however it has now been appropriated by white men, and in the UK is just used to refer to any middle aged women.
This article is from the US, where there are indeed many videos of white people calling the police for made up reasons, and where the consequences have been deadly. (Not clear why there isn't a name for white men who do this - maybe there is but it never spread to the UK? )
It's also true to say that racist men are often overly concerned about protecting the purity of the white 'womenfolk' from black men. (Not so concerned about protecting white women from their own behaviour).
However, the article does not acknowledge the harm that has been done to women by the general use of the meme - the message that any woman who stands up for herself is a 'Karen', and that middle aged women should just get out of the way.
According to the way that 'Karen' is generally used in the UK, this would be a 'Karen'.
www.theguardian.com/world/2020/jun/18/nurse-claims-met-police-wrongfully-arrested-her-because-she-black-neomi-bennett