The kind that thinks communism is the same as nazism and thinks communism is when the government does things.
I hate liberal brain worms.
They seriously do as much damage to the left as fascists by punching to the left and spreading capitalist anti-left propaganda. They overall weaken leftism and help fascism.
We need more left unity, folks. Fash ain't gonna bash themselves. 
This might be a bad take, but when I've done real life organizing the "tankie red-fash" stuff almost never comes up. That's probably because "tankie" tends to describe a western person who has an uncommon level sympathy for non-western socialist movements. And if you live in America and you're organizing here, China and the DPRK just don't come up in discussion often. If they do, it's not really relevant to anything going on. "Tankie" might as well mean something along the lines of "traitor to the west."
I've worked with some folk in a wide amount of organizations who would sometimes go on rants about tankies. We had one guy in Food not Bombs who would always complain about the library we worked at being full of "tankies" (he meant there were books by Marx on the shelf). And one guy I worked with was very adamant that any socialist movement must be intrinsically Christian, meaning the USSR/China etc were all doomed to fail. But those were clearly cranks and their crankishness didn't distract much from the work that needed to get done.
That's the real antidote to all of this, it's getting off the internet. Tankie as it's used online just means someone who doesn't ruthlessly despise communists in non-white countries. If you don't have sufficient hatred for China/DPRK/wherever, then you're just a tankie. I've been called a tankie for saying America committed atrocities against Korea. It's just meaningless national chauvinism by people who aren't doing much work in the first place and if they are doing work they're probably capitulating to liberals. The one thing that's going to have to get through their heads is that the EU and the USA are evil and the greatest source of evil worldwide, instead they're stuck seeing foreign communist movements as equally evil. They'll say "two wrongs don't make a right" or "whataboutism." They say that stuff because they cannot see the west as a greater evil, which means they're carrying water for western imperialism.
It reminds me of the double-genocide theory that trivializes the holocaust. There should be a term for people who trivialize western imperialism. I guess they're just liberals.
That's been my experience with organizing IRL. Occasionally you'll get some baby adventure seeker, but for the most part we have shit to actually do instead of bicker about WWII
Yeah, you got it. It just doesn't come up in real life much at all. Surprisingly it seems stuff that happened 100 years ago on another continent don't have much relevance to scattered socialists in America in 2023. The theory yeah that's still relevant, but the intricacies of what to denounce or who did what war crime? Dude we're trying to get 5 car wash employees to strike to get a $2 raise. Let's focus on tasks. There just aren't enough of us to bicker.
The most relevance it might have is when we're deciding what to put on signs at a protest. Should we use a sickle and hammer? Should we use a portrait of Lenin? Depends on why we're there and who we're dealing with.
Whataboutism? What about deez nuts?
o7 o7
I went on a date once with someone who seemed really cool.
Then put of nowhere they went on a little rant about "tankies" and I realized they weren't the cool kind of anarchist.
There was not a 2nd date.