There is a term for this sort of political discourse: propaganda. The word has a bad odor, but it is not necessarily a bad thing. Propaganda is often true, and it can be deployed on behalf of a worthy cause (say, the fight against Nazism in World War II). Still, propaganda should not be confused with intellectual inquiry. Propagandists do not follow their logic wherever it may lead them; they are not interested in originality. Propaganda is an attempt to marshal arguments in order to create a specific real-world result–to win a political war.
As anyone writing for The New Republic should know, you can use propaganda to demonize those you view as the enemy. Literally.