A kind of interesting idea that deep down inside SJWs know their the bad guy.
That's why so many identify with them.
I have to disagree with this video. I suspect it's true goal was to justify treating SJWs as the bad guy because "even they know it to be true". I also think the author of the piece misidentifies what is happening and why because it fits into his view of his ideological enemies.
- The Comic Itself -- The Comic in question is clearly representing someone taking delight in what they clearly view as divine retribution. Also known as karma. The main character is taken delight because has finally "punished" her enemy as He rightly should have long ago. The New Guy represents those of society who "don't get it" and misidentify the situation. He does not realize that these two are enemies and hence, they are at war in some sense, but instead sees two different people who belong to the same "tribe" and is unable to understand why someone would take delight in their misery. The rebuttal from the main character is of course, is because he is clearly someone who "doesn't get it".
- Mischief Makers -- SJWs are clearly on the nerd spectrum when it comes to their intellectual class. That's not a surprise, but it also helps to pain the way they see things. Since this is basically a strong association with Jung's Magician, it makes sense that one of the ways they might manifest their ire towards their political opponents is through their shadow; the Trickster. The point of the trickster impart is to bring other people down; to take them down a peg and feel good while doing it. Since SJWs cannot currently engage their opponents by force, I suspect a lot of them prefer the Trickster, because it allows them to fight their opponents in a manner that is closer to their true ability.
- Rejection of the Joker -- The rejection of the joker is obvious. The basic narrative of SJWs is that society is oppressive and abusive towards minorities. That's why you are expected to "give up" your power and wealth to those of whom you have (directly or not) exploited. Joker is a betrayal because it portrays a white man (of all things) as being a victim who is oppressed and tormented by society. If Joker had been black, this film would have been perfectly acceptable.
- Denaris (spelling?) -- Denaris is a classic story of fall from grace. Of how the Wise King (Queen) is revealed to be the Terrible Tyrant (Queen). It is the unmasking of all that is wrong and terrible in a person, hidden behind a facade of beauty and narrative. Denaris was a major betrayal to the feminist and SJW narrative because for years--years, what had been seen as a pure, good ruler-to-be was revealed as a vicious tyrant who was ready to exterminate a population to get what she wanted. Now, this narrative itself is not toxic to the SJW/feminist ideology in and of itself, but because it was someone they had all closely identified with as part of their mythology of "The Rise of the SJWs", the sudden revelation forced them to face the possibility that they were no better than Denaris herself. That they're all just petty, evil tyrants.
For the most part, these are separate issues. This is not interwoven in some sort of psychological belief that they're really the bad guys. And while who supports or opposes their ideology does influence who they see as an enemy or an ally, that's not uncommon with someone who is strongly politically active. You could run the same game on conservatives. The belief in divine retribution, that enemies should not be treated like members of society, that narratives toxic to their own is heresy, and that characters they strongly associate with being revealed to be evil is mishandling of the character and the franchise.
I don't think I'd argue it appears to the same extent, but that's because I also believe that SJWs themselves are terribly unhealthy people.