Obama likes the birth certificate talk. That’s why he held it back so long. Keeps people distracted from his destruction of the privat economy, trampling private property, ObamaCare, the debt. He is diddling with conservatives like you do with a cat and piece of string. And while conservatives chase the string and fall in love with candidates like Donald Trump (lifelong liberal) because he will play the string game, there is no voice for full blown conservatism countering Obama. Which is what he wants.
You make a good point, and BTW I am not for Trump by any means.