That is not true. Classical Liberalism is not a atheistic socialist belief system. Even now not all Liberals are Atheists or believers in Socialism.
Few liberals believe in Classical Liberalism. So many liberals believe in socialism that they vote for it. I understand that you want to keep what it used to mean, but that meaning is no longer applicable.
If you want Classical Liberalism, you have to vote for Libertarian-Conservatism or Conservative-libertarianism. Otherwise, you are the Trojan horse that is increasing sociakism in America.