I tend not to believe this story because logic dictates against it. I hate Obama, but if one is to believe this story one must assume that Obama wanted this to happen, which is totally illogical unless you believe he has been placed in the White House as some sort of Manchurian Candidate. It just doesn’t add up because it would hurt his own supposed cause.
I think the incident reflects the politicization of the Federal government's law enforcement and intelligence wings.
Obama and his appointees do not direct those agencies to operate in a way that puts the safety of the citizens as their paramount concern. They seek only to use those powers in their political machinations.
They see no political advantage to confronting the reality of islam and their oft-stated desire to destroy western civilization and bring to heel all non-believers globally. So any intelligence that points in that direction is basically ignored.
But if the Canadian intelligence services reported some nebulous tip about terroristic intent on the part of a couple of Michigan militia goobers, Napolitano and Obama would bring all the powers they have or could grab down onto the accused and any group they could even tangentially label as like-minded, like the Tea Party, FoxNews, or the Boy Scouts.
I have no doubt that they now regret making the wrong call, but only because its suddenly a big ass political problem for them. It's not merely that Napolitano and Obama blew the call, but why they blew it that matters.