To accept one's ignorance needs courage. To accept that you don't know is the beginning of real knowledge. You go on believing, because there are holes in your life which have to be filled, and belief is easily available.
There are three hundred religions on the earth. One truth, and three hundred religions?
One God, and three hundred religions? One existence, and three hundred religions? And I am not talking about sects -- because each religion has dozens of sects, and then there are sub-sects of sects, and it goes on and on. If you count all the sects and all the sub-sects, then there will be three thousand or even more.
How can so many beliefs, contradictory to each other, go on? People have a certain need -- the need not to appear ignorant. How to fulfill this need? Gather a few beliefs. And the more absurd the belief is, the more knowledgeable you appear, because nobody else knows about it.