Why do people always talk about religion.

I don't like talking about religion. Why cause some people would say my religion is better. I had someone tell me I should only believe in Jesus. I ask her why she said Jesus is the only God. Oh boy I told her I only believe in my religion but if I decide to change its my choice. I had a coworker she said my religion is garbage. How could someone say that. I told her to bugoff. People could believe what they want. Don't have someone telling you what to believe in.