Paul has emphatically stated that he believes the principle of pre-emptive war goes against the 'Just War Theory' of Christianity. He has also stated that being in perpetual war does not go along with Christ's teachings. So you are wrong, he seems to be the only candidate who actually CARES about our foreign policy being in line with Christian values.
Here's a clip of him at a debate speaking about pre-emptive war.
By the way, you still haven't shown him defending Christians. Even if he alluded to a Christian (among others), it was only to defend Muslims. He's still not on the record ever defending Christians;.