Explanation:

The British policy of consciously attempting to use communalism to turn the Muslims against the Swadeshi Movement was to a large extent responsible for this. This was the period when the All India Muslim League was set up with the active guidance and support of the Government.
More specifically, in Bengal,people like Nawab Salimullah of Dacca were propped up as centres of opposition to the Swadeshi Movement. Mullahs and maulvis were pressed into service and, unsurprisingly, at the height of the Swadeshi Movement communal riots broke out in Bengal.

The use of traditional popular customs, festivals and institutions for mobilizing the masses-a technique used widely to generate mass movements, especially in the initial stages-was misinterpreted and distorted by communalists backed by the state.

British never assured any land reforms and infact Muslim league which supported the partition was predominantly led by rich zamindars and rulers which were against any sort of reform in land ownership.