Three Jewish educational institutions in the Netherlands decided to remain closed, following a recent call by a Hamas chief calling for protests across the Muslim world. War erupted between Israel and Hamas at the weekend triggered by a bloody attack by Hamas militants, who killed 1,200 people in Israel and took around 150 hostages. Israel has retaliated with strikes claiming more than 1,300 lives, and has rushed forces, tanks and heavy armour to the southern desert areas around Gaza. IMAGES