You wouldn't think someone who constantly criticizes Republicans and calls border security supporters 'enemies' would be easily offended. Carson didn't attack Obama personally or level insults directly at him. Carson disagreed with Obama and doesn't support his politics. In liberal land, that is the same as offending someone, which is considered a sin that requires an apology.
Carson says that the President was cordial after he finished his remarks, and even approached to shake his hand and thank the Dr. for his participation. We suppose it's possible that this was some kind of overreaction from a staffer. To be honest, though, it doesn't sound like it.
It sounds like Obama was furious that Carson had the audacity to show him up. He probably held it together until he was away from the cameras and then he unleashed "President stampy feet" on his aides. They, in turn, set about securing an apology to appease their tetchy leader.
In the end, it doesn't really matter. Either the President was furious and demanded an apology, or his staffers just assumed he needed one to feel better about himself. Both scenarios paint a picture of a little man who's incapable of taking the heat he loves to dish out on a daily basis.
WH wanted Ben Carson to apologize for "offending" Obama
Politics: The White House wanted Dr. Ben Carson to call Obama and 'apologize for offending him' | Best of Cain
Well, I am offended that Obama has lied to us so many times. I am offended that there are new taxes on those of us making less than $250,000. I am offended that my health care choices were taken away. I am offended that there is no border security in our southern states and that states will get sued if they try to pick up the slack from the federal government.