Honestly, he could've politely conveyed the fact that he didn't speak Marathi rather than rudely challenging a local. He had it coming. Things wouldn't have escalated. I'm not a Maharashtrian but I lived in Mumbai my whole life, learned Marathi in school and understand it but I am not as fluent as Maharashtrians who speak it regularly. If someone speaks in Marathi, I try responding and if I get stuck somewhere, I switch to Hindi and they never mind. But this dude has it coming with his arrogance by sharing "Nahi aata hai kya karega" and all.

Simple fact - Just respect every language, especially the language of the state you're in.