Mughal Hindustan was the largest economy in the world during Mughal times, along with China. They were much richer than the Ottomans, the next largest Muslim empire.
All our culture derives from them, including culture, language, food, dress, art, architecture etc. Why should we not be proud of the most fabulous times of Muslim history in South Asia?
Mughal armies used to win ALL battles, as opposed to none now. They fought few battles really, because when the Mughal army moved into battle the Hindus used to vanish.
By the way, Mughal and Mongol are the same thing. Babur was a Muslim descendent of Genghis Khan and came from Samarkand, which is now in Uzbekistan. The early Mughals were Mongols and their mother tongue was Turkish, but the official language in Delhi was Persian. Therefore they spoke both languages.
Here's a video of the world GDP from the year 1600. Previous to that also, Muslim Hindustan was the largest economy along with China. It was destroyed after the coming of the British.