Of course, some Democrats do this as well -- worse, some of them are picking up the bad habit from the Republicans. But by and large, it's still currently a bit anomalous among the Democrats, whereas it seems to be a deliberate and managed strategy on the right.
And I think that, more than anything, symbolizes my frustration with the Republicans. You have to understand, I *desperately* want a Republican Party I can respect -- one that I could seriously consider voting for. The country needs that, because it's not as if the Democrats are perfect -- while I think that the Dems *try* a lot harder, and are much more sincere about attempting to find functional solutions, they tend to have their own big blinders, and are sometimes just plain dumb. I dearly want to be in a position where choosing between the parties is difficult, and requires careful thought between reasoned left and right positions.
Mind, there are still a fair number of conservatives who I respect immensely. The problem is, they're mostly political pariahs at this point: they can't be Democrats, and they've all been purged from the Republicans for the crime of Insufficient Purity of Dogma. A few have wound up as pundits (mostly on left-leaning media that are trying to look fair, since the right-wind media has little tolerance of apostates); many have simply dropped out of politics entirely out of disgust.
But mostly I'm left with a Republican Party that I despise. Indeed, it forces me into a more or less pure Democratic line, on the grounds that, as far as I can tell, the best outcome I can work for is utterly *annihilating* the current right-wing leadership, so that it can be replaced by some more sensible forces.
Right now, though, I mostly want to start calling out the hecklers for the cowards that they are, afraid of the reasoned discussions, complicated issues and messy compromises that make up the real world. I don't like bullies, and that is basically what the heckler culture is made up of: people who are desperately afraid of being seen as anything other than Completely 100% Right All The Time, so they instead just try to shout down everybody else...