Asklemmy

I have a feeling the "lefties" you're talking about aren't actually leftists in any real sense.

I think there's (at least) two factors here: the first being that western leftists in general (it's not even necessarily based on sect, I've seen this in most major tendencies) still have brainworms from the (capital-L) Liberal society they grew up in and so have weird views on certain issues (I won't even deny that I don't still). I mean, truthfully, most leftists around the world have weird views on certain subjects, not just western ones, but the West has absolutely astounding propaganda networks and techniques, so much so that most don't even think that they could be propagandized - that's a thing that non-democratic countries do, and we live in democracies!

And second, there's can be a tightrope to walk on some scientific issues. Like, take the coronavirus vaccines for instance - there are people who argued, from the left, that because all these massive pharmaceutical industries are only interested in profit and not really for curing anybody of anything, that we therefore should oppose the vaccines. This is obviously a harmful, crank belief, but one can see how by opposing everything a giant corporation and the imperialist and racist etc American government tells you to do, that you might consider yourself "more of a leftist" regardless of what that thing actually is. In that case, you might even try and adopt crank scientific positions by only paying attention to papers that suggest that vaccines don't do anything, or even harm people, while ignoring the vast majority that correctly claim that they are beneficial to take and that people should take them. If you're that person, you might think "Oh, I believe the scientists on all these other issues, but on THIS one I think the influence by X corporation is just so high that all of these papers are biased in favor of vaccines; if anything, I'M the one who's more strictly obeying the scientific method!" Again, they're obviously wrong, but if you already disregard (as many of us should) the findings of very official-sounding thinktanks that are actually funded and staffed by capitalist ghouls, then disregarding actual science might be an easy jump to make for some "leftists".

What "political slogan" might you be talking about? You a climate change denier or an "only 2 gender" transphobe? Because odds are that you are based on your rhetoric.