I like the idea of the Joker shaming people for putting special attention the race of his victims. "I may be a homicidal maniac but at least I don't play favorites." or the Dark Knight Joker "I kill an entire white family and no one bats an eye but I kill one single gangbanger and everyone loses their minds!"
This is exactly their mindset. I remember reading SJWs complaining about Loki in the first Avengers film, because trying to take over the world, and introducing an alien invasion to New York? Fine. But calling Black Widow 'quim', aka an old-fashioned term for cunt? Too far, how dare they do that, and so on.
It's especially prevalent in fangirls who want to lust over their bad boys. I remember reading the imdb boards after The Dark Knight came out and it was filled with women/girls posting about how they loved the Joker and they wanted to be with him and they thought either they could change him, or he would be evil to everyone else but love them and them alone. Basically Harley Quinn is not unrealistic.
And then there's the SJW version of that, where their bad boy can murder and sneer and destroy and foil the hero, and they love him for it - but if he does something that shatters their headcanon of 'well he'd treat
me well', such as the recent 'Darth Vader kills the nurse who fangirls him' meltdown, then all of a sudden the creators are destroying the character and making women feel unwelcome and blah blah blah. It's standard 'world destroyed, women and minorities most affected' bullshit. And you see it all over for every handsome bad boy, from Jaime Lannister to Severus Snape, where they're allowed to do all sorts of evil deeds, but the moment it crosses their personal line, usually involving violence towards women, it's not the character at fault - it's the creators for 'writing them the wrong way'. (For Game of Thrones, you might notice that there wasn't exactly a line of women complaining about how Ramsay Bolton was portrayed...)
And you see this mindset continue in things like that 'Women of Darkseid' comic, where (from what I've seen) a universe-threatening tyrant who has been a threat to the entire DC multiverse multiple times is really a bad guy because he ... disrespects women and is sexist -
and that's not even accurate to his character. But again, destroy trillions of lives? Meh. But belittle a woman's appearance?
Worse than Hitler.
tl;dr: Female SJW and their bad boy husbandos are just as bad as incels and their waifus, except like with all SJW equivalences it's worse because they think they're morally correct while behaving exactly the same way.