Hey Sumia...
My friend, a muslim, is married to a girl, whose dad is a hindu brahmin, and mom is a christian whose mom and dad, are protestant and catholic respectively,, her family is a mix of all religions,, they are happy with their life,,
My junior in school is married to a muslim and they follow each other's religion with respect.
Tell your parents that you will not marry against their will, but you will not marry anyone else either,, if they feel marrying a hindu will be an insult in the community, then an unmarried girl staying at home is also an insult. Tell them, that if they force you to be married to someone else, you will die within and have lost interest in life,, and they will lose a daughter,, which again is an insult in the community,,