When this shit started a few years ago, most leftists didn't (and still don't) know who the fuck she was. The schizo part of my brain, which has been correct far too often this last decade, thinks her introduction into leftist peon circles was a social weapons test. Leftists aren't all that historically-minded outside of whatever has the most immediate utility to them, and Thatcher does not have that much utility to them as a historical figure.

What it actually looks like is how they react to (who they believe are) present-day symbols of the right. Their vitriol towards her takes the same form as it does for anyone from JBP to Tucker to Trump, as if they're currently fighting her. I don't think they would have that reaction naturally, since Thatcher is not alive and therefore can't hurt them by being defiant, but with the right signals in the right circles, you could artificially induce it.

The leftist peons' need to signal their loyalty to the cause, and addiction to being the cruel master with an excuse, are their driving forces. Leftist rulers already use that to control their peons on the large scale, it's just a matter of getting the right signals in the right place to induce hatred against a specific target. A dead target can't fight back, making it a great control for an experiment.

If it was a test, it worked, because this started happening right when leftists evolved in how quickly they could coordinate against targets. They could target, attack, and move on to a new target twice a day, in lockstep. All it ever took was the right post on social media, artificially boosted at the right time, with just the right keywords to trigger them. And of course, they've started getting sloppier recently, and it happens to be that Twitter's Trending tab is no longer as heavily curated or editorialized.

As an aside, it's similar to how their attitude on the Civil War has shifted. What was once historical utility (claiming the sole right to define the purpose of the war) is now framed as a present-day conflict ("Sherman was right and there's no quarter for traitors"). That, at least, could have happened naturally, simply because their hatred of belligerent white southerners has never ended, but the setup and outcome is so similar to a much more artificial instance of it happening that I can't quite rule out that it was largely externally influenced.