Attack on Israel: Allowed to Happen, Made to Happen, or ?

After reviewing some data and comments available about Israel and the attack that occurred there this weekend, the Universe was asked: Is there truth to the assertion that this attack was either allowed to happen or made to happen, since Israel is the most heavily guarded nation state in the world, plus other insights or information that can be shared about this situation?
Compilation: https://www.facebook.com/photo/?fbid=24624963687102398&set=a.518012858224151