Repeating high school history ad nauseam is not going to help you.
Here is a simple fact.
Pakistan army action on extremists and insurgents started in the night of 25/26 march. And Indian army was asked to take an action in early April. Here is a quote from Gen. Jacob.
Lt Gen Jacob’s memoirs state: (Page 35 et seq)
"At the beginning of April, the Army Chief called me on telephone to say that the Government required Eastern Command to move immediately into East Pakistan.
How could you defend with a straight face the orders to Indian army in the first week of April? within few days of **Pak army’s action within its own territory **and not Indian area.
As I said, Indians should be as honest as Manekshaw. I think it is really difficult. Won’t you agree.