I think the only real way for anyone to get it is to experience it. I thought it was bullshit propaganda too and I also thought I was relatively far left before first arriving at the .ml domain and further lemmygrad. I am still kind of surprised that we have a community out there that large that seems to legitimately identify with the 'tankie' ideology.
It's a bit of a culture shock realizing that you might just be a progressive moderate.
I think some of the problem too is not realizing that... it's kind of broken in a lot of ways and a lot of the times it's not super apparent why.
There's a lot of things that work in one instance and just don't in another, and I think the user frequently thinks it's because they're doing something wrong when in reality, whatever you're trying to do just isn't working right now.