Didn't know that modi created...shia and sunni classes and wahabism and Sufism! Could you provide links to substantiate your claims?
Just because Modi didn't create those sections that doesn't mean he cannot take advantage using divide and rule. Recently, there has been self-glorified shia spokeman sent in parliament to discredit the on-going minority intolerance using beef laws as excuse to slaughter defenseless Muslim people to death regularly.
British Kingdom didn't create India, its religions and its high/low classes either but that didn't stop British Kingdom to impose divide and conquer against the billion populated nation for 100 years.