One kills because of religion OR ideology; both are types of religion. Religion or ideologies kill to force their world-view upon others.
Because consciousness slowly emerges as babies’ brains develop, it is obvious there is a close connection between consciousness and the brain.
Prayer has been shown to be ineffective, but theists still do it, giving God the credit when it “works” but not the blame when it “doesn’t work”.
Fear can be used for good, but often, in politics, religion, and marketing, it can be used to control behavior.