I agree with your analogy. However, I strongly feel that both capitalism and socialism can't work when you just have one in the extreme. It was different in the past, but now it really is essential to be more central of the line.
It is best to take the successful aspects of each system and get them working together well, creating a blend of the best ideas, and this what I believe.
Unfortunately the right seem to attack this as they see it as a threat for some reason, as though they see it as a halfway point to communist. But Britain has been like this for over 60 years and we won't become communist any time soon, the same goes for lots of countries.
As for the whole left sided politicians kill more, it's sad that people on the left have become corrupted and this is what lead to the killings. The right is harder to get to that point. It's all rather sad really. Central wouldn't allow it as much as the right.
