The post starts out with "most", & continues with "many".
All that to make the absolutist statement....
He says atheism isn't just the opposite of theism: it's a worldview with its own set of beliefs and values.
Atheism will tend to some things.....
- Opposition to theocracy, & hence separation of church & state.
(BTW, this is something many believers agree with.)
- Preferring science to stories handed down by ancient ignorant goatherds.
Other than that, atheists don't have much in common.
So those tendencies aren't enuf to constitute a philosophy,
worldview, dogma, or ideology. It's more of an absence
of those things....or an ultra-minimalist version of them.
His claims strongly suggest that philosophy is a dead field,
ie, not offering new discoveries.
en.wikipedia.org