Say what you will about George W. Bush, but he took his job seriously.  President George W. Bush understood that his most solemn duty as president was the defense of America–in other words, the safety and security of its citizens.  Barack Obama does not understand this.  In fact, he seems more concerned with pushing a left-wing agenda–like the cap and tax climate change bill and the nationalization of health care–than fighting terrorists.  He doesn’t think we’re at war.  He called the incident on Northwest Flight 253 an “isolated incident.”  Are you kidding me?  This is the Commander in Chief?  Let me make this crystal clear for you, Mr. President:  What occurred on Northwest Flight 253 is part of an international campaign perpetrated by Islamic extremists to kill…