The first step is actually learning about something to the point that, when you talk about it, you’re doing something other than revealing and revelling in your own ignorance.
For example...
1. Rice and flatbread are staples around the world. All of India doesn’t eat roti, feel free to learn about the many varied cuisines of India sometime. For example, some parts of India have a tradition of eating beef, others of eating pork, still others tend to be vegetarian. Some regions have blazingly spicy cuisine, others are mild.
2. No, again, even a cursory search online would show you otherwise.
3. Stop spying on people in the toilet.
4. Only the Hindus, not the Muslims, Sikhs, and other religions.
I won’t be replying again, I’m having a hard time assuming that you’re posting in good faith, and if you are that’s worse in a way.