AURANGABAD: A speech by Dr Babasaheb Ambedkar spurred the Dalits in the erstwhile Hyderabad state to join in the struggle to gain freedom from the Nizam's rule 76 years ago. Their agitation took the form of cutting down nearly 25 lakh date palm trees so that the princely state was deprived of revenue, said freedom fighter Bhagwanrao Deshpande, 94, reviving …