If you have a personal relationship with Jesus Christ and God then you are a religious Christian. Myself and many more like me do not necessarily have a personal relationship with Jesus Christ and God. We do however believe in Christianity as a cultural, social, identity and moral platform. This makes us Christian.
No it doesn't. It makes you an ideologue. The fourth commandment:
You shall not take the name of the LORD your God in vain, for the LORD will not hold him guiltless who takes His name in vain.
This madman has attempted to cover his atrocity with the name of Jesus. He admits no personal relationship with the Savior, but calls himself a Christian.
He is not a Christian.
He is a murderer.
Hat tip: Verum Serum