This is a thoughtful piece by Shoaib Daniyal; I’ve long thought that the particular fusion of violence and party politics West Bengal (and Kerala) is among the most under-studied topics in Indian politics:
“What makes politics in West Bengal express itself with such blood and fury? The answer might lie in the structure of rural politics in West Bengal and the existence of the “party-society”: a system where political parties dominate every strand of rural life”