Whom did the Britishers call the father of Indian disaffection and the biggest traitor?

Bal Gangadhar Tilak (23 July 1856 – 1 August 1920), born as Keshav Gangadhar Tilak, was an Indian nationalist, teacher, lawyer and an independence activist. He was the first leader of the Indian Independence Movement. The British colonial authorities called him "The father of the Indian unrest." He was also conferred with the title of "Lokmanya", which means "accepted by the people (as their leader)".