This isn't a conventional war - there is no army to defeat, no enemy capital to overrun. Secondly, the Framers did not give the President dictatorial powers - only the power over the use of the military in conduct of the war as is explictly stated in the Constitution. And the framers again were people who didn't even want a standing army. He has no authority to spy on private citizens contrary to judicial oversight. He cannot write laws without Congress. He can, with the consent of Congress, suspend habeus corpus.
Well, you maybe right or the President maybe right but when questions arise about right or wrong we use case law and for that reason, the President is right. I don't think it's a case of the President writing the laws but a case of interpreting the laws and Constitutional Obligations.