yes some bizarre interpretation of history here, as they did support us with supplies and armaments before they came in as to WW2.
By the way, read the Obama article, please - if you do, you will realise that he opined only after making the following conditional statement, "But also I understand that there's a spirited campaign underway here. My country is going through much the same. And ultimately, the question of whether or not the UK remains a part of the EU is a matter for British voters to decide for yourselves."