When you get a bit older you will realize that just because someone does amazing things doesn’t mean they are omnipotent and omniscient.
Also, there was a strong political will to try a peaceful approach to Gaza (with thousands of Gazans coming in to Israel for work every day), and with the belief that Hamas wants a peaceful approach as well.
Hamas is planning further attacks now, what do you suggest Israel do about it?
And when we both get a bit older, it may come to light that a state leader let this happen, hopefully history will show reality for what it was.
Still, that doesn't absolve Hamas from any actions done, they are terrorists at it's core and the worst type, they are willing to use civilians(and babies) to further their agenda, I don't condone them and personally and think the world would be a better place without them(as any other extremist)