> If an agent has goal A, and they believe (strong believe) the way to reach A is via method P, and that any criticism of P is invalid no matter what, they will keep trying P until it arrives as A, since they know P eventually leads to A.
> Reality doesn't care about strong beliefs though. If reiterating over P in reality leads to result B, that's what doing P will achieve, always and invariably.
Yeah, some say that repeating the same thing and expecting different result is the definition of stupidity.
> If you read the goals (A) of Marxism, they're pretty nice, all things considered. The problem is that Marxism (P) doesn't lead to those results, but to a very different set of outcomes (B).
I'm not sure. I mean nobody knows if it could lead to its goal, because Marxism in practice is yet to be seen. What the USSR implemented was not Marxism (and not even Communism), but in fact Leninism and Socialism. This latter is a freaky, twisted, sick version of it with an actual ruling class, no different to the bourgeoisie or the former feudal nobility (Stalin effectively acting like a czar and his inner circle being the new nobles).
> With American conservatives in general, and MAGA in particular, it's the same. A, B and P are different, but the dynamic is the same.
So true. But I would go even further, the actual ideology (P, A) doesn't matter at all. The root cause of the problem, just like you've said, is "ideological purity requirements never allow P to be questioned". When there's no feedback on P (or worse, only false positive feedback given), then this is technically flying blind, no matter what the ideology in question is, the result will surely be an epic fail and fall (since A != B).