When even NBC has someone point that how stupid and/or dishonest Sanders is,

you know it's bad.
I was forced to learn how to read and write by teachers who brainwashed me while teaching me how to write the “F” for “Fidel,” the “C” for “Castro” and so on. The "education" under a socialist regime is probably the most malicious of their programs, because it is — to the eyes of people like Sanders — an unalloyed, irreproachable social good, and yet it is one of the most essential tools of indoctrination and repression. There, according to Che Guevara’s teachings, as a small child I was taught to hate different ideas, looks and behaviors.

The Cuban educational system is not a "literacy program" but a tool of indoctrination, designed for the creation of the “New Man” — one who is removed from what we would recognize as Western civilization’s values, who is intolerant and ready to kill in order to impose the revolutionary ideology. And it starts with those ABCs.