Ani DiFranco's What If No One's Watching. I was already atheist before I heard it, but it's still a great song.

@Lateralus Have you seen this thread?

Voltaire, Ministry, Skinny Puppy, Nine Inch Nails, XTC... And I guess I'm dating myself.

My favorite band is Hatebreed and contrary to beliefs due to the name, they are not racist. They have a lot of meaning to their music and the fast grinding of it helps alot to stay motivated. I'm also a big fan of Rage Against The Machine

My son was a great follower of Mark-e -Smith now deceased - lead singer of post punk group The Fall, he was always late nearly always drunk and his fans were seriously loyal waiting for him to show up till midnight he had no front teeth and I think what I loved most was that the fans loved each other . I used to be a fan of Hawkwind.

REM losing my religion is my theme song. I would actually say the movie Zeigist is the straw that broke the camel's back

Of sorts, perhaps not so much. Blue Oyster Cult. I loved the band for many years, could not make out what the hell they were singing about much of the time. About ten years ago after much study of a few secular, if esoteric subjects it made rich sense. I discovered their songs were based on a story written by the producer and founder of sorts for the band. This work figures prominently in the characters and lyrics of most of their early songs and many thereafter. Made the weirdness even cooler. In some respects my core philosophies resonate with these lyrics and stories.

The first song I heard that directly lent support to some of the "free-thinking" ideas I was beginning to have was 'Witch Hunt' by Rush.

Yep! Metallica, Moterhead and Voltaire all influenced my journy to atheism.

John Lennon's IMAGINE. It's the definition to me of agnostic atheism. "Imagine no religion. Its easy if you try. Nothing to kill or die for, above us only sky"

I've always liked The Police. There's something about their music looking for deeper connections that have nothing to do with God.

Christian rock!
Don't get me wrong, I enjoy a stirring rendition of Amazing Grace as much as the next "guy" and Pentatonix totally ROCKS Hallelujah (not really about religion, read the lyrics) but when Christians decide to get creative with rock music, the results can be.........
Well, horrifying! If this stuff doesn't put you off religion, then you are not JUST tone deaf!
[bing.com]

Within Temptation. I have to be emotionally prepared to listen. They are incredible. Admittedly Not super familiar with the entire catalog, but have Memories in my head writing this.

No not at all

No.

Grateful Dead