Let me take a weird role and defend the liberalism claim:
see Classical Liberalism
http://en.wikipedia.org/wiki/Classical_liberalism
Classical liberalism is a political and economic philosophy, originally founded on the Enlightenment tradition - established by thinkers such as Adam Smith -, as well as on the tradition of a Nordic school of liberalism even slightly before that, set in motion by a Finnish parlamentarian Anders Chydenius. Classical liberalism tries to circumscribe the limits of political power and to define and support individual liberty and private property. The phrase is often used as a means of delineating the older philosophy called liberalism from modern liberalism, in order to avoid semantic confusion.
Under modern liberalism or American Liberalism we see a little change:
http://en.wikipedia.org/wiki/American_Liberalism
Main distinction: Modern liberalism, as a branch of liberalism, contends that society must protect liberty and opportunity for all citizens.
It is a fact that the people who gave us free speech were devoted Christians, sorry if that bothers you (not really).