Why did Lord Krishna allow the Mahabharata war to Happen?

People wonder why Lord Krishna allowed Arjun to fight in the war. In reality, He was a Vasudeva, He was Narayan. From the ‘Nar’ stage (Ordinary human being) He went to the ‘Narayan’ stage (God). He was not the doer of anything, He gave the same knowledge to Arjun. He tried His level best to stop the war. But somehow the war was meant to happen.

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