a tankie is someone who unironically supports Mao, Stalin, Lenin.
the entire Great Leap Forward and the Soviet Union gulags. they reject the idea that the Holodomor was an intentional genocide or that tens of millions of people died because of fascists who co-opted Marxist or leftist ideas in order to just gain power when things collapsed because of instability.
make-pretend socialists, basically. people who are the opposite of MLK and Malcom X (post-Mecca)
They are called tankies because of Tiananmen Square in 1989 in China when they used literal tanks to crush innocent students (basically high schoolers and college students) to death. Google it, it's fucked up.
They don't care about life. Just State worship. State-sponsored atheism of a sort, except you really just worship the State.