Atheism and Anti-Theism same thing?

[Excited Penguin]

Can an atheist identify as an anti-theist?

Are you getting at the absurdity of being against something which you have no belief exists?  Of course anti-theists are not actually against God.  They're just against what they feel is a destructive lie.

I'm not an antitheist.  I am an atheist, an agnostic, an ignostic and an apatheistic as well.

So you're not against belief in God(s)?

Antitheism generally takes the form of being actively opposed to theism, even when such theism doesn't affect you personally.   In my own mind (and I admit that this is neither accurate nor particularly fair), I tend to equate antitheism with religious evangelism, as both positions involve getting yourself mixed up in things that don't concern you.  For instance, if I'm sitting at home reading the paper and come across a story that a local church is building a new annex, as an atheist, I'd probably mutter, 'Bloody silly waste of time and money', and go on with my tea.  As an antitheist, I'd be more likely to throw the paper down in a rage, being knocking together a protest sign, and heading over to the church to march up and down with a scowl on me mug.

Boru

As you described the situation, you're an antitheist in both cases, just being more energetic in your antitheism in one of them.