I honestly don't mind conservatives from Australia, Europe, Canada or Asia, but the US is such a massive leap to the right of everyone else's political spectrum, that the republican party are just unimaginably right-wing for us. Heck, even the Democrats are unimaginably right-wing for us. You guys call your new health-care system 'socialist' when our most far-right party would never ever even consider putting in something like that because it would be too far to the right for Australians - national and tax-funded healthcare and education are just taken for granted as the minimum for a civilised society. Similarly, capital punishment has been banned for many decades because it is barbaric. You have a tax system where low income earners can end up paying a greater proportion of their income into tax than the high income earners. Your infrastructure is falling apart because you won't pay enough tax to maintain a first world nation, and yet your people are so poorly informed that they think they are over-taxed. They've had a hand in many of the world's atrocities during the latter half of the 20th century: the overthrow of democractic governments in south america, arming and supporting brutal dictators in Cuba (pre-Castro, being happy to support the prior military regime that was far worse than Castro, and that's saying something, and then suddenly playing the democracy card when the military regime is replaced by a less awful marxist one), Venezuela, Iraq and elsewhere, a policy of 'American Exceptionalism' which by itself negates any notion of respect for other nations/peoples, need I go on?
By logical syllogism, that makes the supporters of such atrocities - i.e. the Republicans and all but the most left-leaning of the Democrats, barbaric. Again, I'm not particularly leftist by most first-world standards. It's just that the US really is founded on a different set of political values than the rest of us, and some of it's core principles are utterly unacceptable.