The entire idea of rising up violently against a democratically elected government because you disagree with it has a major problem: What do you replace that government with? If you replace it with a democracy, the electorate is just going to elect someone you don't like again with good probability. Your only option is to replace it with a dictatorship, in which case you've definitely not made things better.
No, violence against the government simply isn't justified unless it is no longer a democracy. And at the moment, the US remains very much a democracy, and a rather vibrant one. Sure, there are problems -- incumbent Congressmen seem to last way longer than they should in Congress, and it would be nice to have more choices than just 2 parties. But ultimately the elections are fair, and you have the freedom to try to convince people that there is another way. In fact, a call to violence is an obvious refusal to take part in a democratic process, one that I will not join in regardless of how many people take part.
No, violence isn't the answer. The answer is education and eliminating voter apathy. Too many voters are simply too ignorant of the facts. And I realize the right-wing partisans will accuse the liberals of being stupid, and the left wing partisans will accuse the same of the conservatives. The problem is that for the most part they are right. Ignorance has nothing constructive to offer in the political discourse of our nation -- all it provides is screaming, hyperbole, ad-hominem attacks, but worst of all: loyalty. Loyalty to the party leaders who perpetuate this madness.
So go forth and fight for change, but not with guns; show people how to think rationally, how to question society and the world. And even more important, how to debate an issue without demonizing the opponent as a terrorist/socialist/.