His body language is clearly stating that he does not believe a war he says. He is just saying what the audience whats to hear regardless of what he truly believes. Playing politics at its finest.
OVER 1,000 families flee to Texas every single day to save their lives and rebuild their futures and those of their children . They are not Moving to the Amnesty Champion Newt's history class , or pro union boss control Santorum's big government nanny state of PA or Romney's Romneycare MA or R. Paul's ozone layer . They are seeking the benefit of the Unmatched, documented successful leadership of Gov Perry .
This was another really good answer, he expanded it nicely with the segue into O's war against Christian religions.