There are no serious proposals to adopt the US system by anyone outside the USA, and this has nothing to do with anti Americanism which is usually restricted to foreign policy. To posit supporters of socialized medicine as Nazis or communists is a deeply offensive and dishonest act of totalitarian abuse. It is not conservative ideology. It is conservative behaviour.
When it comes to a buffer against the liberal agenda, I don't really know what you mean. Obama's foreign policy is stridently interventionist (his speech in Oslo must have been a slap in the face for the pacifists that gave him the prize) in line with my neo-liberal views. In fact he is continuing and extending the neo-liberal policy of Bush's second term, after Bush got rid of the hooligan Rumsfeld and put Cheney back in his kennel. I agree that if Obama tries to extend the State further then there should be a buffer, but I think the interventioin in America's economy, again started by Bush, will end with the reconstruction of US automotive companies from disastrous over capacity, largely protected by America's very un-laissez faire bankruptcy laws, to a highly efficient new configuration. It will be firmly back in the private sector before Obama stands for another term. Healthcare will not have collapsed. There will be no Death Panels. The surges in both wars will be working. With a bit of luck the Iranian people will depose Ahmaninajad. Obama will storm to a second term.
And if he doesn't, that's democracy, which is the real buffer against an inappropriate agenda.
America's in fine shape. Now it's not torturing people any more and it is consistent with its values of liberty and the rule of law, it's the leader of the free world again and democracy is back on the global agenda.