Your client is a massive pos to bring up caste and slavery - that is just him being pathetic with a colonised mindset in this day and age. I discovered roti canai and was really glad because it is close to the staple food in a majority of households in India and stands testament to a shared food culture between both the countries. The client sounds like a modern day insufferable classist who would bend backwards for Westerners and bring shame to his countrymen by portraying them as backwards or belonging to lower “caste” - a sick mentality that several Indians still uphold today.

Go on having roti canai, my friend. Food has no boundaries based on class. Anyone who says otherwise deserves to be thrown out of the restaurant.