Another great movie about Hard Tyranny aka Stalin’s USSR is “Burnt by the Sun”, http://www.imdb.com/title/tt0111579/plotsummary?ref_=tt_ov_pl, I highly recommend if someone has not viewed.
Have you ever actually used that argument with a liberal?
I have yet to hear one that didn’t say “we wouldn’t do that”, meaning that somehow, the leftists in power today wouldn’t abuse that power like leftists always have in the past.
It’s hard to argue with a belief, much less change what is, to them, an assumption.