Socialism has at its heart, a globalist vision. Like it or not, most countries are adopting socialist systems of government. Take for example the continent of europe where I can't think of a non-socialist government. This movement has pervaded International laws on human rights and is consistently supported by the media.
Capitalism is the best system. It isn't a perfect system, but it does provide for individualism and invention. Both of these are stifled under a socialist (communist) system. The old adage that power corrupts, but that absolute power corrupts absolutely is especially true of the socialistic international order and its attempts to undermine the nation state.
Stalin and Hitler were both socialists. How many people died when they seized absolute power?
McSpotlight: *sigh*; another person who thinks that Hitler was a socialist; someone find the guy a dictionary.