Nitish Kumar Vs 'Protest Gang': Why the issue is escalating? | Bihar Polls

Another 'protest' drama was witnessed in Nitish Kumar rally in Bihar's Muzaffarpur when a man threw 'chappal' on Nitish's helicopter to show disagreement with his rally. 
Why are 'protests ‘in Nitish's rallies increasing? 
Watch the video to know why dissent is rising against Nitish Kumar in Bihar ahead of the polls. Why are people shouting slogans against him in his rallies?