"Gamergate happened because gamers hated women" "Animemes revolt happened because they hated trans people" "Christians want to kill queer people and want all women to be handmaidens"
Why do they keep making up these kind of lies? They always ignore what people actually say or what actually happened, and keep making up lies about people.
No they definitely do, it's just a much more simplistic version of it that (most) people age out of over time that takes into greater account context, path dependency, iterated games etc.
The "Generic Libtard" as we'll call them for this discussion DOES value "fariness" and "care," but only very simplistic, single shot, zero sum variations of them.
For fairness it's "anyone having more than anyone else is bad/a sign of injustice" because they aren't sophisticated enough to consider the temporal dimension of HOW those inequalities arose...and/or just assumes that can be discarded as unjust...doesn't understand that "fair" depends on value and value is multidimensional with individual term weights varying from person to person... the list goes on.
Leftists "care" in the sense that they "want to stop other people from experiencing harm" but completely block out the idea that suffering is often times earned through action (or inaction), that suffering isn't just meted out by malevolent external actors and is often a default state, that some people are WILLING to suffer short term for longer term gain because of longer time horizons, etc.
The Generic Libtard defaults to the most simplistic, 0th order models for how human interaction, with other humans and the environment, occur.
That suggests that in addition to diminished Moral Foundation Dimensions, leftists also seem to be chronically underdeveloped in terms of their moral theory/reasoning. See Piaget and Kohlberg's theories of moral development or similar ideas. They are underdeveloped in the sense of applying the cognitive muscles of abstraction to moral reasoning, and it really shows if you ever try to argue with one.
Yet another factor is leftists being far more empathizing than systemitizing compared to other political groups (libertarians being the only group showing a relative preference for systemitizing...) [and women being much more/less empathizing/systemitizing than men and the so-obvious-its-forbidden-to-discuss differences that results in...].
The Generic Libtard simply DOESN'T reason abstractly about things across time in the context of iterated games [poor systemitizing ability] between agents with different value structures [because they can't conceive different valuations] being able to only focus on what distress/issues they immediately see before them [high empathizing].
Sure that makes them more vulnerable to/ultimately results in them living in a moral reality that effectively is a figment of their imagination...but the root causes are much deeper.
That can still be lumped under 'compassion,' just a very primitive, zero-sum one that applies only for the subset of people within their circle of care (the woke and the 'oppressed') because everyone beyond that sphere, either by dint of their identity or hurtful transgressions against the tribe, is literally beyond moral concern. Ergo, you can show compassion to your in group just as much by 'comforting' them as by committing evil against the out group that, in moral zero-sum fashion, is constantly out to oppress you.
This was something one of Peterson's grad students supposedly found in research; that rabid SJWs scored VERY high in 'agreeableness' which would seem to run contrary to their behavior of attacking others like feral dogs...but not if your moral personality is extended only to your in group, which has to be protected from the outgroup at whatever cost.
True there are some psychopaths out there who just love to torture others, and such a movement will attract well beyond baseline, but most of them are just moral primitives whose domain of moral concern applies ONLY to their tribe because they're too stupid or short sighted for anything beyond stark Manicheanism of in group and out group and even the most basic realization that they shouldn't do that merely because that system could turn on them (see all the former libtards who woke up, but only after the experience of being turned on).
To say nothing of being too dim for concepts of moral symmetry/universalism, veil of ignorance, etc. etc.
In the end I think there are two fundamental (stylized for brevity) approaches to modeling leftists:
Psychopaths aside, I don't think the former view offers any real utility or viable explanatory power - especially since you can back out the former from the latter broader explanation.
The only real utility the former model has, which is what I'm sensing is more in line with what you've posted, is to make you feel better about purging them when reality finally comes to collect its interest on the debt we've accrued.
But the second model doesn't preclude that either, as even IF it's the case that most are warped or handicapped it hardly means they're fixable/redeemable...BUT it offers ideas on how to avoid traveling the same road we're currently on again.