 and that's where Israeli tanks are now refocusing their efforts. The fighting is forcing thousands of Palestinian civilians to flee once again. Hamas says these actions could cause ceasefire negotiations to collapse. The gaps between the two sides appeared to have narrowed in the past week, Hamas having relented on its demand that Israel commit to ending the war. Jonathan Savage, Fox News. More controversy at Columbia in New York City, one of many college campuses with pro-Palestinian protests in the spring.