Why are people involved in killing each other in the name of God?

[Question by Dr. Sheshadri Thiruvenkadam (Balaji).] The original founders of the religions were Human Incarnations of the same God like Krishna, Jesus, Mohammed, Buddha etc. Every religion says that their God alone created this entire earth or this entire humanity. Unfortunately, there is only one earth and this proves that there is only one God mentioned by all the religions. Since God is one and the same, there cannot be contradicting concepts between different religions. But we find some contradictions and people are divided based on these contradictions. This division leads to quarrels and finally people end up killing each other. These contradictions cannot be from God because there is only one God as said above. These contradictions were introduced into the religions only by some misinterpretations made by the followers, in the name of God. Hence, the killing is also being done in the name of God.

The Quran says that you should protect even followers of other religions and convey the message of Allah to him. It is left to him whether to follow the message or not. Hiranyakashipu worshipped Lord Shiva and his son Prahlada worshipped Lord Vishnu. Lord Vishnu killed Hiranyakashipu not because he worshipped Lord Shiva but because he tortured Prahlada to change his religion of worshipping Vishnu. Infact Shiva is Vishnu (Shivashcha Naarayanah—Veda). The conclusion of this is that God will punish you if you torture a devotee of any religion obstructing the freedom of his religion. Prahlada did not force his father to worship Vishnu. The same God exists in different forms in different religions. Hinduism is a mini-model of this unity in diversity that should exist in the universe as Universal Spirituality.