Never underestimate the left to any degree or -ism. They will always have it in them to be like this. The American Nazi Party was quite popular at one time and The Soviets were actually much more cruel even before WWII and the darlings of the American left until the USSR collapsed. There is still a Communist Party in America. I think the left dreams of putting every Christian, Jew and Conservative in a Concentration Camp or Gulag.
Their grandchildren and great grandchildren are today’s liberal left. It’s a family religion.