Half-Life,
Now relate any of that to the thread's topic.
Do not claim atheism needs the assumption of a material world. It's already been explained that atheism isn't materialism. It doesn't matter if all the universe is made of matter, ideas, spirits, cheese, bad smells, or what the fuck ever. Either a theist produces a god or I stay an atheist.
Materialists ARE atheists. THESE are the people who believe things can exist independently of minds. These people have never been able to show one lick of evidence for this external world independent of minds, yet they insist it is true.
Face it, that's the definition of dogma. And while it's fine to have dogma, don't go around pretending it's scientific. It's certainly not based on empiricism, which immaterialism most certainly is based on empiricism.
It seems you reject the conclusion of Berkeley's empiricism because you don't want God to exist. But, don't be a coward about it. Just admit that is your position and we can discuss it from there.