Nope, he finds it important no one uses what to him is a fictional character to push laws and regulations. You would also care if people prohibited you from doing something you like to do or think is important because Superman said it was wrong.

That’s a big difference, in general atheist don’t care about God(s), they care about people trying to use God(s) to push an agenda, but the people who’re trying to use God(s) to push that agenda rarely see the difference.

You’re thinking of anti-theist.

Antitheism, also spelled anti-theism, is the philosophical position that theism should be opposed.

Atheists can merely not care if there was a god because they don’t see any proof of it.

Atheism, in the broadest sense, is an absence of belief in the existence of deities.

Atheism can also be more anti than that, but isn’t necessarily always that way

The classical Atheist cares. He finds it important that God does not exist.

I see you fall into my second line of lumping Atheists with anti-theists.

Agnostic is you believe there is something equating to a god but don’t believe in God