Ron Paul nails both sides pretty well. From Paul at ronpaulinstitute.org:
Following the recent clashes between the alt-right and the group antifa, some libertarians have debated which group they should support. The answer is simple: neither. The alt-right and its leftist opponents are two sides of the same authoritarian coin.
The alt-right elevates racial identity over individual identity. The obsession with race leads them to support massive government interference in the economy in order to benefit members of the favored race. They also favor massive welfare and entitlement spending, as long as it functions as a racial spoils system. Some prominent alt-right leaders even support abortion as a way of limiting the minority population. No one who sincerely supports individual liberty, property rights, or the right to life can have any sympathy for this type of racial collectivism.
Antifa, like all Marxists, elevates class identity over individual identity. Antifa supporters believe government must run the economy because otherwise workers will be exploited by greedy capitalists. This faith in central planning ignores economic reality, as well as the reality that in a free market employers and workers voluntarily work together for their mutual benefit. It is only when government intervenes in the economy that crony capitalists have the opportunity to exploit workers, consumers, and taxpayers. Sadly, many on the left confuse the results of the “mixed economy” with free markets.
Ironically, the failure of the Keynesian model of economic authoritarianism, promoted by establishment economists like Paul Krugman, is responsible for the rise of the alt-right and antifa. Despite a recent (and likely short-lived) upturn in some sectors of the economy, many Americans continue to struggle with unemployment and a Federal Reserve-caused eroding standard of living. History shows that economic hardship causes many to follow demagogues offering easy solutions and convenient scapegoats.
To continue reading: Oppose Fascism of the Right and the Left