I'm not sure it's her religion. That article is the only outlet making reference to it and doesn't have any direct quotes from LE. Other outlets are still reporting motive unknown.
Yes, and this particular Santa Monica Observer reporter posted a photo of a different but similar-looking singer in his initial article about the shooting. Not accurate or detail-oriented! This is a free, weekly newspaper. That doesn't mean it's always wrong, but in this case the reporter is making a huge, unsubstantiated leap.