Exactly. Trump really hammered Obama and referred to him as an unmitigated disaster. With friends like those...
My take is that everyone is saying that Obama is a disaster anyway, and this far out in the cycle, it does not seem to matter whether there is criticism. Even the press will occasionally say something negative during this period. Trump was safe in being critical to give himself the street cred to demand the birth certificate.
What matters, is that it has taken the Birth Certificate issue off the table by bringing it out before it would have an appreciable effect on the election, so no one will care any more. That he released it so soon, even if fraudulent, will mean that everyone will disregard claims of fraud, no matter how well founded.
Trump was Obama’s agent and clean-up man to clear the decks of a thorny issue, and to incidentally make a little cash for himself.
A liar will always tell you they are a liar if you listen carefully enough. Trump has done that, IMHO.
“In politics, nothing happens by accident. If it happens, you can bet it was planned that way.” Franklin Delano Roosevelt