To watch a fanatic is funny on one side, but very scary on the other. And if I talk about fanatics, I don't necessarily mean the religious ones. Just imagine a debate between a truly devoted Moslem, Jesuit, businessman and last but not least an anarchist. They would be willing to argue forever for their illusionary sets of norms which give them the sense of security. I can go even further and say, that uncertainty and insecurity have so far been the roots of many evils, perhaps even most of them.
Uncertainty tends to create a dogma.
Dogma is the defense, the shield against uncertainty. And if you look at the historical record of various dogmas, it is not a pleasant sight. Examples may be the bloodbath in Jerusalem during the First Crusade, Bartholomew s Night in the French religious wars, the Holocaust, Stalin s reign, mass killings when Pakistan was created, the Khmere Rouge in Cambodia, and so on and so on. Even terrorism and extreme nationalism could be considered as dogmas, fruits of uncertainty. Nowadays, some idealistic dogmas are still strong, but not as they used to be.