Why are they walking out?

Predictably, a group of pro-Zionist countries has staged a walkout yesterday at the UN during Iranian President Ahmadinejad’s speech. Here are the words which triggered this walkout: How can one imagine that the inhuman policies in Palestine may continue; to force the entire population of a country out of their homeland for more than 60 years by resorting to force and coercion; to attack them with all types of arms