Conversation so far:
How did Lala Lajpat Rai die?
James A. Scott ordered police to baton charge protesters and personally assaulted Rai. Rai did not fully recover from his injuries and died of a heart attack
When did Lala Lajpat Rai die?
Lala Lajpat Rai died on 17 November 1928.
What was Lala Lajpat Rai's relationship to Bhagat Singh?
Bhagat Singh vowed to take revenge as it was a murder of a very tall leader in the freedom movement,
What is the HRA/HSRA in relation to Bhagat Singh?
Hindustan Socialist Republican Association was a revolutionary organization, also known as the Hindustan Socialist Republican Army, established in 1928 by Bhagat Singh among others.
Who is John Saunders in relation to Bhagat Singh?
Bhagat Singh fatally shot a police officer, John Saunders, mistaking Saunders, for the British police superintendent, James Scott, whom they had intended to assassinate.
Was anyone arrested for the shooting of John Saunders by Bhagat Singh and Shivaram Rajguru?
Bhagat Singh and Batukeshwar Dutt threw bombs at empty treasury benches. They made no attempt to escape and courted arrest.
Are there any other interesting aspects about this article Bhagat Singh besides his relationship to Lala Lajpat Rai and the killing of John Saunders?
Contemporary reaction to the killing differs substantially from the adulation that later surfaced.
How did contemporary reaction differ to the killing of John Saunders by Bhagat Singh?
The Naujawan Bharat Sabha, which had organised the Lahore protest march along with the HSRA, found that attendance at its subsequent public meetings dropped sharply.

Question: and the opposite reaction?
Self-contained rewrite: What were the opposite reactions to the HRSA and Naujawan Bharat Sabha after the killing of John Saunders?