Being asked about BJP's door to door campaign in the state, he said "Today there is a totally negative approach against those people who have betrayed and defected. People know that they have indulged in immorality and are ethically wrong. People want to teach them a lesson."
"I hope people of Karnataka teach a lesson that BJP's unconstitutional activities come to a halt," he added.
The Congress leader further alleged that the BJP is destroying the very own fabric of democracy.
Responding to reports that Congress will join hands with JD(S) after December 9, he said that his party is contesting alone on all 15 seats.
"After the results, we will see what we have to do. For now, we have to bring all the seats to our fold," he said.
On December 1, former Karnataka deputy chief minister G Parameshwara had said that there is a possibility of Congress-JDS alliance in Karnataka after the bypoll results.
Senior Congress leader Mallikarjun Kharge also hinted that Congress is not averse to ally with JDS.
The by-elections for 15 out of 17 seats in Karnataka are slated to be held on December 5. The results will be declared on December 9.