numberwang on 06 November 2017
According to his "friends" and his social media posts he was a militant atheist, ranting about stupid believers.
"Classmate Nina Rosa Nava write on Facebook that the mass murderer used to rant on the social network about his atheist beliefs. She said: “He was always talking about how people who believe in God were stupid and trying to preach his atheism.”"
https://www.thesun.co.uk/news/4851812/texas-church-shooting-devin-kelley-facebook-atheism/
This might be the first case of atheist-terrorism in the US.
