After Columbia officials backed down twice on a deadline for pro-Palestine student protesters to leave the school’s “liberation zone,” the encampment is still going strong — and Jewish students are shaken. School president Minouche Shafik’s word “means literally nothing at this point,” Jess Schwalb, a Columbia University junior, told The Post. Hundreds of pro-Israel protesters marched outside the school gates Friday morning, demanding administrators evict the campers. This comes after the school let a Friday deadline lapse for student protesters to clear out. The deadline had already been extended from administrators’ previous demand that campers on the lawn pack up...