Hitler was a leftist

Right, but the problem is that Non-continental-Europeans almost always think that „socialism“ means "communism“ in the sense of (for example) Sovietism, and that is not true, because examples of other socialisms (the Roman Catholic Montanism, the German [especially Prussian] Socialism, the German National Socialism) are also known and experienced (more or less), and they have never been communistic, on the contrary: they have been anti-communistic - not seldom even more anti-communistic than capitalism has ever been - and by far less anti-capitalistic than communism has ever been.