As to the original question: Leftist regimes are usually dominated/supported by mobs of intellectually stunted, emotionally immature permanent juveniles. Just like adolescents everywhere, when things don't go the way they intend, they lash out; sometimes it's actually against those whom they perceive as standing in the way of their objectives; most of the time it's at whoever is in arms reach.
Trying to teach a Leftist to understand the physical/economic/etc. laws that govern their utopian failures is like trying to teach an ape to write. Eventually the ape is going to get so frustrated, he'll just stab you in the eye with the pen.