This conflict is years in the making, but it's certainly not been made better by the ruling Hindu nationalist BJP party. Though Manipur is roughly equally divided between Kuki Christians and Meitei Hindus, the Hindu population has become brazen in their attacks against both Christian people and churches, targeting husbands, wives, and children. While the situation worsens, official security forces aren't even trying to help but rather have allegedly taken part in the attacks against Kukis.
It's odd that Prime Minister Modi is receiving flack for this incident, as he hasn't encouraged nor condoned any violence against Christian Kukis or any other minority. Rather, the Prime Minister has expressed sorrow in the wake of this video and promised to get justice for the victims no matter where the crime was committed or who committed it.