I think the proper response would be, “Obama says he’s a Christian. Who am I to say otherwise?”
Just leave it at that. None of us is God and only God knows the heart of a person.
O's Department Of Just Us knows which actions are the result of racism in the hearts of white people.
He also refers to his muslime faith. He also recites the Shahada. He celebrates Ramadan. He goes out of his way to defend muslime terrorists, and gives Christians the back of his hand - constantly! Given his own words and behavior over the course of many, many years, any reasonable person would answer the question just as Walker did. "I don't know."
A man of courage would also add, "But he sure acts like a muslime terrorist."
That's true, but IIRC there's a bible verse that says "By their works you shall know them". If you take Obama's support for "good works" such as legal abortion aka murder, or so-called "gay" marriage aka sodomy, into consideration it seems rather obvious, to me at least, that his version of Christianity doesn't jibe with the bible's version.