Congress created ‘SALFA’ has a hand on this. Congress is trying to create panic among Bengalis & political score to garner support of Bengalis (Hindu) in Assam, Tripura & W.B. The problem has created by Bangladeshi Ilamic terrorists group driving out Hiindus from Bengladesh towards NE states of India, claiming Bangladesh Ilamic country & at the same time pushing Mulim to India through NE porus border to create Ilamic states in India. This is special design of ISIS & ISI of pakistan
Congress in NE states & communist in W.B played vote bank politics long time & ultimately common people paying price for that.