Don't know how u got info that there were riots in Bengaluru in the last 6 months, but sure there have been riots of various kinds in Cong- ruled AP, MH and CPM's WB, in the same period. Cong is not principled because it took JDs support despite losing election (it was an anti-Cong mandate in KN), but BJP certainly lacks the engineering skills of CongI to twist mandates. Deve G was no less of an opportunist when Dharam Singh was ruling?!