So, clirus, if "atheism=socialism", then how does that explain atheists who are pro-capitalist and reject socialism themselves (and don't deny they don't exist, either). One cannot be pro-capitalist and be a socialist at the same time. You're not making any sense, but then you never do.
On the other hand, I find some non-leftist atheists even more offensive than the leftist atheists (i.e. the cult of Ayn Rand).
For political purposes I break people into four groups.
1) Conservative Christians
A Conservative Christian is a person that believe in the inerrorancy of the Bible.
A Conservative Christian believes the Biblical doctrines; God created the universe, and God created humans,
2) Liberal Christians
A Liberal Christian has accepted Jesus Christ as Lord/Savior, but believes the Bible can be interpreted in many ways and maybe the Bible is just not applicable to present day situations.
Liberal Christians usually favor Socialism instead of Capitalism and usually will oppose the death penalty and war.
3) Conservative Atheist
A Conservative Atheist sees no need to accept Jesus Christ as Lord/Savior, but believes in conservative economic policies and Capitalism.
These are frequently the very wealthy people.
4) Liberal Atheists
A Liberal Atheist is a person that believes humans can achieve perfection. Socialism is a required party of that perfection.
A Liberal Atheist believe in science and medicine doctrines: the universe was created by the big bang, humans evolved from nothing.
Summary
I find it is the concept of liberal = socialism as in Liberal Christians and Liberal Atheists which vote for democrats.
I find it is the concept of conservative = capitalism as in Conservative Christians and Conservative Atheists which vote for Republicans.
The above is why you see Liberal Christians (like Catholics) voting for democrats and most business people (Conservative Atheists) voting for Republicans.