Funny you should ask
I don't support DP and I am not a religious person but almost anything can be justified under Christian dogma as stated in the Bible. I am sure those Christians opposed to DP can find an equal number of references to support their side.
If "Eye for Eye" doesn't grab you there is "render unto Caesar" and probably a dozen other references that would allow CP.
One of the great things about Christianity is its flexibility. :)