It's also a real weak confederation he's forming.

The "we the theists (or I guess non-nihilists?) all agree that..." falls apart once you start finishing the thought because they don't agree on much outside of negative partisanship towards certain outgroups before splintering back into fighting about dogma. Buddhists and Baptists both think life has meaning, and that's a statement with low utility.

Is it even true? I assume he’s referring to religion but I thought the irreligious population of the planet had broken 20% between China already and the West becoming increasingly agnostic/athiestic.

Not intended as anything more than "I'm not a crank to say that, unless you think most people (now and in history) are cranks"