If someone who is a Bahai or non-bahai, commits a sin, or does not follow the teachings of Bahaullah, we, as individuals do not go to them, and say to them why you sin, and why you do not follow Bahaullah. This is what Bahai writings teach.
As regards to having different belief, such as your Hinduism, I as an individual do not tell you are wrong.
But, I can discuss and share my view. I can participate in a fruitful discussion with you, to compare the teachings or interpretations of Bahaullah, with your view of God or Religion. The discussion is not about, I am right and you are wrong. It is about showing why I think Abdulbaha or Bahaullah is right, and other views which contradicts His view are wrong. Do you see the difference? So, if someone participates in discussion, trying to show why he thinks Bahaullah is wrong, I also discuss why I think Bahaullah is right. How is this hypocrisy?
Then why, in these discussions, is it almost entirely about Baha'i and very little to do with the tenets of Hinduism? I offered some time back for you to ask questions about Hinduism, but apparently you're not interested. Action does indeed speak louder than words. But then, in your defense, it is really hard to learn anything substantial about my faith, unless you actually practice it.