"What they have done is simply unacceptable. How can they mutilate and take away the head of our soldier? This cannot be tolerated by any person," Hazare told reporters here.
"Pakistan seems to have forgotten the beating it took in the 1965 war with India. Don't they remember how they begged for mercy when Lahore was bombed during that war? But on and off, it keeps raising its head against India. We want a repeat of 1965. Pakistan should be taught a lesson again," Hazare said.
The 75-year-old also expressed his willingness to go to the border and fight enemy soldiers.
Hazare served in the Indian Army for 12 years before he was honourably discharged from service in 1975.