why the people of karnataka elect the bjp as the single largest party?

No no.. not at all.. Always in the election if you see, In every elections, you will find the changes in the both the parties in the every states. If you find any one is good, and doing good things to the public, means there is a chance for them to continue for the subsequent five years. But now a days, the people are finding the worst from the worstest.. So, there is no chance, for this changes in every five years, is avoidable.. No one is perfect in the political and the political parties.. group..