Tankies act a heck of a lot like Alt-Right MAGA, both outright calling for genocide so long as it is done against their enemies rather than allies. In short, tankies claim to be leftist, but aren't.

That said, Hexbear isn't even that much really, so much as pure trolling for its own sake. Both are examples of what happens when echo chambers are allowed to exist for a long time - the people inside become radicalized and immune to factual information from the outside that may run counter to their allowed list of interpretations of matters.