I doubt it. Many are Catholic. Many more follow superstitious practices that are definately not Christian. Christians would not steal across a border they know they are not allowed to cross, steal services such as welfare, health care, education, food stamps, etc., and steal jobs. Many people in prisons consider themselves Christian too. Some are, others are not. Just calling yourself Christian does not automatically make you one. I can sit in my garage and call myself a Chevrolet, but that doesn't make me one.
Would you sit in my garage and call yourself a Corvette? I've always wanted one. ;^P