Why did Pakistan government outlaw meetings and rallies in 1952?

The martyrs' sacrificed their lives in 1952 to establish Bangla as a state language of the then Pakistan.

Undivided Pakistan refers to the country Pakistan that became independent from the British Rule in 1947, which was divided into two wings East Pakistan (present day Bangladesh) and West Pakistan (present day Pakistan).

Police killed Salam, Rafiq, Barkat and Jabbar to stampede the procession.

The Language Movement is related to the independence of Bangladesh in the way that it made the people aware of their rights and inspired them to fight for their independence.

21 February is observed annually worldwide to promote the awareness of linguistic and cultural diversity and multilingualism.

The government was bound to declare Bengali as a state language because some students like Salam, Rafiq, Safiur and Jabbar were killed and there were mass protests all over the country.