Basically Ayers believes the biggest problem in American is education. So the answer to that problem was to round up 100 million people and ship them by train to the Southwest and re-educate them in Marxist ideology.
Out of that 100 million they were ready to kill 25% off the top they estimated could not be re-educated. This is the mentality of Stalin killing hundreds of millions of peasants because it would take too much time and effort to re-educate them to Marxist thought. If given the chance these people would turn the US into the Cambodian killing fields.