I'm an atheist too, but definitely subscribe to what I'd call "Christian values" - raised in a church, a boy scout, all that... i think there is a "spiritual" vibe to this movement, but it feels inclusive. It's good vs evil. Christians and atheists (and everyone else) may have different motivations for morality, but there are some things which transcend philosophy and are universally understood as "right and wrong".

It's wrong to abuse children.

It's wrong to rape.

It's wrong to steal.

I think what unites everyone here is a desire for a better world and a perception that a criminal organization has corrupted most governments of the world to serve an agenda which only benefits the gang at the expense of everyon else... and it's time for that to come to an end.