It's exactly the same as you painting every Occupy Wall Street character as representative of the Left except that in this case, these people were actually at a Republican debate. You do like having it both ways don't you? Boy, you could take that a lot of ways.
Here is what happens when the left does take power. Jacobins were leftists who siezed control of the French Revolution, set up the Committee of Public Safety and started the Reign of Terror.
Do you typically use one's sexual preference as a pejorative? Not exactly keeping with liberal norms, are you?