It shows that people are inherently good by their nature. But evil in this world takes advantage of people's innocent faith in the good. People don't want to even think possible that somebody could be so devious that he 'd fool people's vulnerability to which gullibility exposes them. Therefore Netanyahu's speech fell into deaf ears. When the evil says it all of a sudden has turned the tables and convinces that now it wants to be good, then yes people welcome that and want to believe it. Unfortunately people must keep learning the hard way. This brings onto my mind Chamberline and his "peace of our times" after Hitler too had convinced the world of his peaceful intentions. Believing in Hitler's assurances on peace cost 60 million people's lives. The question thus arises: can we afford more human lives that such naive faith in the evil's word costs us?
from the article: At UN, Netanyahu spoke to a world that refused to listen