I believe President Obama tried to say in a very unusual place for that type of dicourse that the holocaust did take place and that it shouldn't be a subject for every day joke balancing this strange statement where he was with remarks describing the Palestinians every day pain. I guess, he would be too much to ask he had added that refugee camps more than 50 years old for some, and most of the pain have been by large and small organised by some using the Palestinian's cause to serve their own national interests or hatred of Israel...