* Violently throwing out competing religions, like Christianity
* Belief in a single god-king (Stalin)
* Total faith in the power of communism as the most perfect solution to the world's problems
* Harsh punishments handed out to those who question the orthodoxy (gulags)
* Obsessed with submission of the individual before an institution
Blind, violent faith in bad ideas could reasonably be blamed for a vast amount of the world's problems.