Libertarians often consider the Left and Right as two sides of the same “statist” coin. The bottom line for both is increased state control over individuals. They have different things they want to force on the citizens, but they both want to control the citizens.
“Hitler was a socialist” compares leftist ideals with Hitler’s: racism, statism, bellicose nationalism, antisemitism, environmentalism, and other “leftist” values. Wait: leftists aren’t racists or nationalists! Read on…
“We are socialists, we are enemies of today’s capitalistic economic system for the exploitation of the economically weak, with its unfair salaries, with its unseemly evaluation of a human being according to wealth and property instead of responsibility and performance, and we are all determined to destroy this system under all conditions”
Adolf Hitler, Speech of May 1, 1927. Quoted by Toland, J. (1976) Adolf Hitler Garden City, N.Y. : Doubleday. p. 306