New Delhi, Jan 26 (ANI): All India Kisan Sabha general secretary Hannan Mollah said that they learned a "lesson" from today's violent incident that happened in Delhi during farmers' tractor rally. "The sabotage in Delhi today is done by the enemy of the farmers and has been not done by the farmers. It is part of their planning. We condemn this incident. From today's hooliganism, we have learned a lesson. In future, such people should not get a chance to enter the movement, we went through the movement in the peaceful manner," Hannan Mollah said.