Volf, like George W. Bush, answers the question affirmatively. Kidd seems not so sure. America's "key Founders" (the first 4 Presidents, Ben Franklin) like Volf and Bush, answered the question affirmatively.
(As noted many times before, these Founders thought uncoverted Great Spirit worshipping Native Americans worshipped the same God they did. And the Great Spirit, unlike Allah, doesn't even claim to be the God of Abraham.)
I saw Volf speak live last year at the CPS Conference at Gordon College. (Video of said presentation below.)