Actually, it hasn't been officially declared a war. We're not fighting against a country, so much as a misguided group of people scattered around the world. I don't think they can change the immigration laws unless we have declared war against a particular nation. I'm sure I could be wrong, and the politicians are certainly within their rights to change the laws to suit this unusual situation, but until the Congress actually participates in 'declaring war', what can they really do?
BELIEVE ME, I agree with you...I want them to stop letting them in, but I don't think it's as easy to do as it would seem to us.