Dennis makes it a point to use liberals and atheists in the documentary to drive home the point that the Left is oppressing them just as bad as conservatives. In effect, they are eating their young. Anyone who stands in their way will be trodden under foot. Only conformity will be tolerated and any deviance from it will be crushed.
The film makes the point that universities around the country are what is being targeted the most, because this is the place our future leaders will come from by in large. Because of this, many liberals have come to the conclusion that the Left poses the largest threat to our freedoms and holds the reigns of fascism within the US.