wrong dude gita just has to do ur deed (good deed) and forget about the fruits the war of Mahabharat was fought between to side the pandavas who represent goodnnes and Kaurva who represent bad and eveil it wasn/t fought between the people of two religion U know in gita the word dhram which means religion is used and the Lord Krishan himself says that dhram means truth and justice and god says that where truth and justice is there is dhram and with dhram I am always
In our holy books it is said that a true and good humane being will go to heaven not a Hindu