Hindus have been celebrating this festivity way before that incident ( which also has a lot of controversy). The are a lot of Hindu propaganda in it like women inside the palace including Rani Karnavati comitted suicide to save
their honor. Nothing but made up myths. But humayun being the traitor he is ,sided with non-muslims against a lion hearted Muslim worrier like Bahadur shah. Hindus can boast about that incident but not muslims but here you are spouting rubbish to defend a pagan festivity orchestrated by Awami indian dalals at the border.
Humayun was brave to answer the call from his Rakhi sister. He was a devout Muslim. Humayun accidentally slipped his feet when he was sitting down on the stair of his library at hearing the call for evening Magreb prayer (Azan).