You certainly have a stellar biography and are obviously a person to be taken seriously. I would however like to discuss a couple of points. It is true that the constitution does not require a 2 party system. However, in reality, in our form of government there are practical reasons that more than two parties cannot fit within the system we have. We are not a parliamentary system of government. We do not form ruling coalitions that can change allegiances on short notice and vote a no confidence resolution. As an example; let's assume congress was split 3 ways with 50% democrat, 40% Republican and 10% % "conservative party". Our system does not allow for the forming of a coalition between the GOP and the CP so the Democrats would hold the majority with all attendant committee chairmanships.
The liberals will not fracture their coalition the way Conservatives do. The DNC IS the liberal party it has no conservative or even a discernable moderate element. The political reality is that any 3rd party success will come from disaffected conservatives or libertarians and that means that congress will be in liberal control for a generation. A 3rd party president will face the same political calculus no matter what he says in his campaign. He will either be a lame duck from the start or he will be forced to compromise just as any president must to get anything at all accomplished. You are entirely correct that it is our sacred right to vote the way we wish and that no guilt should be attached on the other hand it is important to understand that a vote to "punish" is just that because if the politician "hears" you and satisfies you then there is another voter that will "punish" him for doing it.
This is true and the country will surely convulse. However, the history of the American experience shows that freedom is a fragile thing with a big cost. Our tradition is to fight those who attempt to subjugate us. Hopefully, the Republicans will consider this and help us clean the political house. Otherwise they will also get swept out in the chaos ahead.