This is even more bullshit, lmao. The only leftist you listed was Stalin, every single one of the others is a far-right fascist that oversaw a Capitalist economy. That includes Putin, who is reactionary. Even then, many call Stalin red-fash, and they aren’t entirely wrong either.
Additionally, if you think reactionary changes after states fall is because the far left and far right are similar, then again, you don’t understand historical trends or movements. These are reactionary movements to a large-scale failure.
Again, this is nothing but horse-shoe theory nonsense, it’s equivalent to astrology in validity but far more dangerous politically.
Here’s a quick example: which is better, an extreme antiracist, or an extreme racist? In your eyes, both are equally bad. Radicalism is not bad alone, neither is extremism. Each view must be judged on a case by case basis.