I don't think he's behind it. From my own experience there are plenty of crazy folk out there and they're perfectly able to hyperventilate and hallucinate all on their own. However, I do believe he's baited them a few times, including the delay in releasing the long form until last year. It's kept the crazy and vocal out there, discrediting all of his critics.
On the day Obama announces that he was actually born in Kenya I'll get on my pegasus and head out in search of a dragon's nest so I can bring home a few dragon eggs to make a dragon egg omlette for my supermodel fairy wife. I'll take about 5 but I'll really only need one since fairies are so small that one dragon egg will last them a long time.
If Barack Obama was born in Kenya and he actually knew the exact circumstances of his birth in a third world new African nation in the early 1960's, there was probably only one paper copy of a birth certificate that was made.
If you put a match to that one single piece of paper, there is no record of a birth in Kenya.
It's a little more than just the lack of any evidence he was born in Kenya. There are the two birth certificates from Hawaii, the statements of two members of HDOH, the statements of people who knew him when he was a very small child, the newspaper announcements, the 1967 Johnson Administration inquest, etc.
It really would have to be a massive coverup. Doesn't mean it's impossible, but generally the bigger the alleged conspiracy, the less likely it is.