You don't have to travel as far as pre-independence time, they had opposed introduction of computers into offices, english education at primary level,globalization which they now have promptly accepted as blunders when situation seems otherwise. But the damamge is already done and it is the people who have suffered. Now accepting them as blunders will not make things rewind. All these shows how ideologically devoid and opportunistic they are. They oppose the same thing at center or other non-left states which they pursue shamelessly at West Bengal.