It would be pretty brain damaged for them to hit Michigan with any WMD strike, as we have a VERY large Muslim population here in Dearborn and surrounding areas. (I believe it's one of the largest in the nation).
Now, if they were targeting the GM Building off of the river ala Twin Towers..(I think the last Intel report I saw said something about an attack coming in from Canada via the water..this would put them smack headed toward what was formally the Renessaince Center - now worldwide HQ of GM).
In '99 and '00 my wife and I frequently went to Northwest Trading on the Seattle waterfront to stock up on items for our import store. The proprietor was/is a Muslim and handled product from India and Pakistan. Things were remarkably calm then; Hindus and Muslims (and a few Christians!) would do business side by side with no problem. In fact, I believe it is still that way although I haven't been back recently. The proprietor always laid out the welcome mat for us since we had to travel a couple of hundred miles and always checked the items we purchased to make sure that weren't out of date, etc.
There is a big Indian retail store about a mile from the Microsoft campus and things are much the same there with the mixed clientele. I can only think of one purely "Muslim" store which is in a cubbyhole with no room for chairs. But there may be others now. Some Muslim women wear the costume and others don't.