if the god really exists…

People love to believe in a religion. There are many religions on this planet. A global 2012 poll reports that 59% of the world’s population is religious, and 36% are not religious. /Source Wikipedia/ However, three of them comes to the forefront prominently. And, Christianty, Islam and Judaism are blocking the development with pressuring continuous to the humanity. This means a further aspect; the majority puts the pressure on the minority, in a way contrary to the scientific facts. The world date is 2014, and the people can believe in these, leaving aside all scientifically thoughts:

-A virgin can give birth. / virgin Mary-Christianity
-A man can rises to the sky against to the gravity. / Mohammed- Mi’raj- Islam
-A man can divide a river into two parts. / Moses- Judaism

Yes, if the god really exists he should have good excuse for the answer to this question: Why he didn’t upgrade the capacity of human brain?