They can blame the Israelis all they want to, the truth is the Egyptians have plenty of reason to hate the Gaza Palestinians all on their own. The last thing the Egyptians want is for the SOBs to be able to freely come and go into Egypt proper on any large scale, all they have to do is think back to how things worked out for Jordan on that and remember how 'Black September' came about when the Jordanians had had enough of the Palestinians' bullshit. Neither the mainstream Egyptians nor the Israelis want a piece of each other any more, each has pretty much ended up with what it needed, if not necessarily all it wanted, after four very costly wars.