[Non-Sequitur]

This information came from his mother in all likelihood and even Obama said in his book he didn’t believe what she or his grandparents told him.

Why would he lie about his birthplace?

[bvw]

Even you can give an answer to that question. Same as why did Sun Yat Sen claim to have been born in Hawaii, when he was born in China?

[nclaurel]

Why would he not lie about it? Lying seems to be a skill he possesses and uses well.