Where to start...
Not sure where the Republican remark came from? I'm guessing it's because you think I must be, which I assure you I am not. I detest both parties.
You claim that not allowing regular people to own guns does not lead to totalitarian regimes, which I believe is just wrong. It is commonly the first step of tyrants is to disarm the people. Not to 'Godwin' the discussion, but look at Nazi Germany. For that matter, look at modern day England and to what degree of a nanny state they have become. If you think that is a good direction for America to head in, then we just have fundamental differences in opinion about what American liberty is supposed to be about. I don't know what to say about thinking nothing can ever happen in America, since that is exactly what everyone thinks, "it can never happen to me." As far as untrained fanatics going against the government, maybe you should look at, well, nearly any major conflict in the last 50-60 years. Ask a Vietnam vet what rural villagers with small arms can do. I can point to numerous examples of underarmed groups overcoming superior military might, and if you read a little history you can find them yourself.
And I agree ficitonal media does not cause violence. But a lot of people do. That's the problem, who gets to decide what indicates the potentially violent individuals you mentioned in your first post? Just because you think it doesn't means nothing, chances are you won't get to make those decisions. You see, I'm not in favor of banning your guns or your video games. I like all of the Constitution.
No, reducing the amount of deaths by 1 is not sufficient to limit liberty, nor is the prevention of 100 deaths sufficient. That's like saying it's okay to torture a terrorist if the information he gives you could save lives. Compromising our ideals is not worth it. There is no price too high for freedom to the man determined not to be a slave. So perhaps, as a nation, it's time to ask ourselves: is freedom no longer worth the cost? If that's the case, I wish we could at least be open about it.