But what I mean is, there's a difference between imposing something over people's heads on the mere convenient assumption they're too brainwashed, and aiming to unbrainwash them and letting them join the calls and action for change. Mostly those wanting systemic change aren't even assuming it's possible, or remotely logical -those with more power are not the ones likeliest to dismantle their own power-, to impose top down like that.

Much of the UK old Labour left backed Brexit and always had, it was seen as aiming at systemic change.

That's not really accurate to history, though, superstition never went away, nor did the people calling it out as such, nor is it dependent on education or the 'general population' - eg. some more highly educated people might be more rather than less inclined to defend religion when lower class people were just sick of institutional religious exploitation.

Disagree, I think in the UK we easily have sufficient public support for veganism, and at absolute minimum for welfare legislation that would have the inevitable effect of drastically reducing then likely eliminating meat consumption, it's the actions and practical understanding that haven't caught up. It's an edgelord minority willing to look at animal ag. and go 'this is fine', very few think or want to say that.

>The problem with ‘overthrow the whole system and put in my ideologically pure alternative’ is that it tends to be undemocratic ( but for their own good because they are too stupid, evil or brainwashed to know what good for them of course) and all ideologies tend to have unintended consequences when faced with real life that may be worse than the one overthrown (and often the intended methods are morally suspect.)

Not really, it tends to assume false consciousness and that people would already agree if they weren't being mislead. Most people in our society -UK here- even already easily agree animals have moral value, claim to care about them, back laws protecting them and want further such legislation, frequently express horror at footage of animal agriculture or outright refuse to watch it yet continue to act according to the status quo and counter to their own apparent beliefs, for various reasons. I can't think of an actual instance of such an ideology being implemented with unintended consequences, examples?

Charity also is not counter to ideological consistency aimed at systemic change - I donate to vegan charity Viva, for example.