Why are all atheists liberals?

[Dystopia]

That's called the peer effect, no one actually says they are not so liberal because of fear of repercussions.

I have some political beliefs that I have never revealed because I don't want to get a shit-storm of comments.

Except I've been saying that I'm a conservative on here for years! I don't even use a fancy term like classical liberal. I think that's part of the reason I like the term conservative, even though you are right, classical liberal is more accurate than either that or libertarian. Conservative is just so much more in your face. It's the same reason I tell people I know in real life that I'm an Atheist, even though Agnostic is probably more accurate. Atheist is just so much more fun and in your face.

If you want, you can create a topic to proclaim your conservatism

Except that I'm most likely a classic liberal:

Classical liberalism is a political philosophy and ideology belonging to liberalism in which primary emphasis is placed on securing the freedom of the individual by limiting the power of the government

I'm a classic liberal with some post-modern liberal views (a bit of social justice here and there) and some conservative views (anti-European Union, against affirmative action, support decreasing welfare expenses and support deporting useless immigrants). I'm a bit of everything I guess, I may even hold some ideologically technocratic views