Mahabharat

Mahabharat is one of the holy books, which is not considered auspicious. People don't encourage keeping Mahabharat holy book at homes. But, at the same time people preach Mahabharat's teachings in the form of Gita, holy book. Both the books revolve around Mahabharat, the biggest war between the Moral and Immoral, But one is considered auspicious while the other is not. In Mahabharat, the biographies of many warriors like Vedvyas, Bhishm Pitamah, Dhatrastra, Duryodhan, Dronacharya, Shakuni, Karn, Ashwathama, Barbarik, Kunti, Gandhari, Draupadi and others are written. Each had their qualities, but was no one able to stop the big war, Mahabharat? Didn't anybody tried to stop it? Why was this Mahabharat turned into a struggle against the immorality resulting into a mass destruction and loss of lives? Kaurav died in the war, while their brothers Pandu gave away their lives in the wish of heaven. Why was Mahabharat the reason behind the end of Pandav 

's lineage? What was the aim behind Mahabharat?  

In every holy book it is stated that it is the creator, who is the doer. But is it true? Are the deeds of human beings not responsible for the consequences? Is everything out of reach for humans? Or humans can have everything if they try?