Ergo, belief in the racist, Marxist philosophy of black liberation theology is not necessarily incompatible with being a Christian who has orthodox beliefs on most matters of Christian doctrine (e.g., the trinity, the resurrection, virgin birth, and so on).
Taking them at their word, there's more evidence of BO's "Christianity" in an historical orthodox sense than there is for George Washington and James Madison. I use them as examples because, I admit the evidence isn't conclusive. Whereas J. Adams, Jefferson and Franklin are on record explicitly announcing what it is they believe in (i.e., that they reject the Trinity and other orthodox doctrines) Madison and Washington are less clear.
Still, taking them all at their word, BO has given us more evidence of his belief in historic Christian doctrine than GW or JM did.