No, I understand perfectly. However, you might be misunderstanding where I'm coming from. The issue that you're raising is fair. Hardcore leftists do not care about hypocrisy but a lot of their base is not that way. The liars and legitimately evil opportunists are in charge, they don't represent everybody though. I'm glad no one wrote me off when I was a leftist. They essentially program "trigger phrases" to shut down a norm's reasoning centers. Getting past that is only half the battle.
I think you're being both too optimistic and too pessimistic. It doesn't make sense to group all of them together, instead the whole idea is to create fracture points in every plank in the mainstream platform to weed out the sincere people from the NPCs.
Science worship is dumb because there isn't anything spiritually satisfying behind it. Empirical observation is great but that's a process, not a set of beliefs. It can be easily twisted, which is why they're like that in the first place. It took us 8 years to actually get a large amount of people to accept the racial gaps in IQ despite knowing about them for 100. Don't assume instant acceptance. Unfortunately, everything is based on what people believe, not the objective truth.
You're assuming you can just go out and preach the truth and everybody will go, "yeah, totally!" when all evidence points to the contrary. I've been doing this for a long time, it doesn't matter if you're right, it matters if people listen.