i think he means that the oppressed black people should start fighting rather than protesting. in a way, singing could resemble a peaceful protest, but swinging is a kind of punch (in a way). this is just my guess and i could be wrong, but this is as clear as it gets to me. Malcom x was the type of man to always fight for his and their black freedom with aggression to put him in front of the peaceful MLK protesting's. because they would never work how they work nowadays. Thank you.
Explanation:
"Another little-remembered facet of anti-Latino discrimination in the United States is school segregation. Unlike the South, which had explicit laws barring African-American children from white schools, segregation was not enshrined in the laws of the southwestern United States. Nevertheless, Latino people were excluded from restaurants, movie theaters and schools.
Latino students were expected to attend separate "Mexican schools" throughout the southwest beginning in the 1870s. At first, the schools were set up to serve the children of Spanish-speaking laborers at rural ranches. Soon, they spread into cities, too."
Britain called them the “Coercive Acts” while America called them the “Intolerable Acts”