No liberal should feel compelled to choose between Czar and Bolshevik. 

A liberal sees Leftism and Rightism as accidental flavors of illiberalism. Tyranny of a few and tyranny of all; tyranny of priests, monarchs, markets and mobs all prevent an individual from realizing individual purpose.

It is difficult, but not impossible, to establish alliances of purpose, of why. It is far easier but morally vacuous to ally over matters of who, what or how. Liberalism is a why that uses economics, political identities, policies, insititutions to serve the purpose of maximizing liberty: the greatest degree of freedom for the greatest number of people.