Obama loathes Hillary. If he can make any ideologue that reflects his political philosophy with the exception of Hillary, he will.
It should also be noted that the meeting was not supposed to be discovered. A reporter got a tip from someone and showed up for the meeting. Attorney General Lynch is no fool. If she did not intend to meet with Bill Clinton she would not have meet Bill Clinton. The reporter was not allowed to take pictures of the aircraft or anything. This was a prearranged meeting. It was only discovered because someone in the secret service or the FBI leaked it to this reporter.
Also, this meeting was so crucial to Hillary and Bill that they did not send a third party nor use electronic of telephonic communication. It had to be face to face without anyone knowing. I do not know who leaked the information about the meeting to the reporter. He is a patriot of our great nation.
I forgot to add that if this was not a prearranged meeting there would be nothing to leak to the reporter as the secret service would not have known about it in time to leak to a reporter nor would the FBI. Someone knew and they leaked and thank them for their love of country. He or she will pay a high price for their act of patriotism.