“BNP-Jamaat's mindless violence, again”

I refer to the erudite write-up, “BNP-Jamaat's mindless violence, again” by Editor Mahfuz Anam on the present political situation in Bangladesh. (January 16, 2015) From the observation of the editor, the BNP and its associates have resorted to terrorism, failing to organise mass-movement against the government.
Obviously, people at large have no reason to be unhappy with the present government's economic performance. For the last one year, the country was by and large peaceful. Now, terrorism has set in at the behest of the BNP and its associated religious bigots. The innocent people are made victims, and cars, buses and trains are being torched. The country is suffering unprecedented loss only to get a party in power. Is this the democratic way?
Dialogue is possible only with political parties having political programmes, not with terrorists. Is there any instance in any country where terror tactics went parallel with dialogue? Then why should the government of Sheikh Hasina submit to the party (or parties) that are   involved in violence and intimidation in pursuit of gaining state power?