This bill hasn't passed. If it turns out that it is passed, with the support of some blue-dog dems who've fallen for the paranoia of the far right, it still won't be Obama's fault. It'll be the fault of the doomsday conspiracy theorists (read teabaggers).
Obama signed the NDAA law. So yes he has had a hand in taking away my Constitutional freedoms. Obama has a history of signing something he does not support or does he just say he doesn't support it and then signs it anyway.