In fact, why does the Chicago Teacher's union and the left in general feel so strongly about this:

The memo then devolves into a greatest hits compilation of left-wing causes.

"Twenty-first century social movements around the world are illuminating the root causes of social crises, class inequality, bigotry, human rights violations, and environmental degradation," organizers write.

How predictable: The "Free Mumia" movement is just part of the left's larger efforts to delegitimatize America's free market economy. Mumia’s guilt or innocence is unimportant to these radicals. They’re only interested in his case because it serves as a useful cudgel that they can use to attack American capitalism. The leftists have determined that Mumia's race and religious beliefs (Islam) are useful in agitating a whole bunch of people and bringing them into their anti-American fold. Should Mumia ever be set free, they’ll just move on to the next cause on their list.

We mention all this to remind readers about the type of questionable people who are teaching our children, writing the textbooks, shaping the curriculum, and leading the teacher unions.

On the show this week I played audio from a video showed to High School kids in Menasha this week, which was essentially a socialist screed. Yes, these are the people shaping young minds eight hours a day.