1966 anti-cow slaughter riot

On 7 November 1966 a group of Hindu protestors, led by ascetics, naga sadhus and backed by Rashtriya Swayamsevak Sangh and Bharatiya Jana Sangh (aka Jan Sangh), approached the Indian Parliament to protest to criminalize cow slaughter. The incident resulted in a riot which ended with a death toll of 7 people and hundreds were injured.

Quotes

 * In fact, 1967 was the best-ever performance by the Bharatiya Jan Sangh before it merged with the Janata Party. What could have led to this sudden spurt of support for Sanghis? In all probability, it was the 1966 police firing at sadhus and other Hindu activists who were protesting outside the Parliament in Delhi to demand a blanket ban on cow slaughter. While the official records of those killed is very low, the popular claims of those killed range between few hundreds to even thousands. Whatever be the real numbers, the fact that it led to the feeling of ‘Hindus under attack’ among a segment of people, in all probability helped the Jan Sangh in the ensuing elections. Firing on kar sevaks at Ayodhya similarly helped the BJP in the 1991 Lok Sabha elections.
 * Sanghi Who Never Went To A Shakha. Rahul Roushan. Rupa Publications India. 2021.