Tankies want Hitler to win and the country to collapse. They are like evangelicals deeply wanting the apocalypse to happen to punish all the people who didn’t agree with them.

Your analogy is even more apt than that. A lot of them are accelerationists/anti-electoralists too, who hold the faith-based belief that making the world worse will magically cause the working class to unite and overthrow their oppressors. The belief is based upon the words of a dead authoritarian and has no historical data to suggest that it is remotely accurate. They are happy to give vulnerable populations as blood sacrifices because of their faith in it somehow resulting in a better world.