Why was Nisargadatta Maharaj so pissed off when talking?

However, watching him on youtube made me wonder if this is just a cultural thing or if he had this personality. So you expect a so-called enlightened person to be calm, collected, and measured. He told people who argued with him to get the fuck off if they were unable to LISTEN! I share this sentiment because there will be those a-holes who must question anything he said, doubted, and showed off. So this business is self-exploratory. He just gave mantras to some who were ready and told many others to “piss off.”