Do you think bengalis 'vote' for CPM? They dont. CPM votes for itself. Because of the present situation in West Bengal where a communist dictatorship (within democratic India!!!) is in place, no solution can be arrived at by the electoral process.
The Indian Army should be entrusted with the responsibility of eliminating all commies (CPM, CPI, Maoists etc) from India permanently. As far as the method to be used is concerned, the army knows better than me.