hindu is a person who regards themselves culturally, ethnically, or religiously to the laws of hinduism. are you familiar?
Somewhat I've done extensive studies in theology but did not concentrate much on  hinduism
well it has also been used as a geographical, cultural, and religious identifier for people indigenous to south asia.  the word hindu has evolved over time
It's hard for me to get behind. The beliefs are very different then my own. How many followers do they have? 
im not sure but 14-18th century indian poets used the phrase hindu dharma which is hinduism and contrasted it with turaka dharma, which is islam.