This is very similar to a behavioral pattern dogs exhibit called barrier frustration.

Say a dog really wants to go meet another dog, but it is on a leash and so can't reach the dog to go say hi. The dog will often act with what might look like aggression: barking, straining at the leash, etc. But it is actually not being aggressive toward the dog. It is frustrated by the leash preventing it from getting there. The dog doesn't act aggressively toward the person holding the leash either. It just rages aimlessly against its tether.

You see what I'm getting at? We're often more mad at the leash that stops us from getting what we want than we are at the one holding it. Liberals act as an extension of the right by keeping Leftists from their goals, but we should still remember that the right itself is the primary enemy and Liberals, ultimately, are more concerned with maintaining the status quo than they are about upholding any particular set of beliefs.