Bihar Polls: Are protests in Nitish's election rallies 'fixed'?

Watch the visuals from Muzaffarpur, Chhapra, Sasaram and Begusarai where people are seen raising slogans against Nitish Kumar's rallies. 
Is this all a part of dirty politics?
Watch the video to know why there is 'lynching' politics against Nitish Kumar in Bihar ahead of the polls. Why people are shouting slogans against him in his rallies?
Take a look!