When our family served in India, we were constantly confronted with various forms of Hindu worship. The vast majority of the population in our city was Hindu. Additionally, many Indians trekked to our city to participate in elaborate Hindu religious rituals.
The sad part in watching the Hindus worship was that they were looking to the wrong god for help. The Hindu pantheon of gods offers many, many different gods to choose from. We know, however, that there is really only one God: the triune God of the bible.
I encourage you to actively try to get to know Indians in your neighborhood, workplace, etc. The majority are probably Hindu. Meet them. Get to know them. Love them. Share the hope of Christ with them.
To read more about Hindu worship in India and Christians who are trying to reach them with the good news, click here. What you will find is an interesting article about Hindus worshiping the false god Ganesh as part of a typical Hindu festival.
But for the grace of God, I would be right there worshiping Ganesh with them.