You're right. Israel has the power to protect it's citizens.What your point?The first rocket that is fired from the living room of a member of ISIL living in Palestine you'll get your answer.
MOSAD has spies all over Palestine.
Israel is the occupying power of Gaza, or were you ignorant of that fact too?
Be careful Israel doesn't decide enough is enough and turn Gaza City into a thirty foot thick molten glass lake.