This thread has really confused me. I thought most people considered atheism to be a rejection of a supreme being or God, which Buddhism clearly espouses. Being an atheist and being irreligious are two different things. Even if I believe in rebirth and other realms and all that, I'm still an atheist if I reject any deity. Even belief in Devas doesn't rule out atheism so long as you consider them to be transitory phases, essentially like other dimensions, which I feel is the correct Buddhist understanding. Stephen Hawking believes in other universes too and he's an atheist.
Gain and loss, status and disgrace,
censure and praise, pleasure and pain:
these conditions among human beings are inconstant,
impermanent, subject to change.
Knowing this, the wise person, mindful,
ponders these changing conditions.
Desirable things don’t charm the mind,
undesirable ones bring no resistance.
His welcoming and rebelling are scattered,
gone to their end,
do not exist.
- Lokavipatti Sutta