The reason they adopted this was to "A.Justify Revolution". This was because up to this moment there really had not been a formal explanation of the goals of the movement.
Very long story short, farming and sugar, as well as a port to china, east india and asia. and the islands were a prime place for a navel base.
Mayor Daley deployed thousands of police officers to restrain the protesters.
When the Democratic National Convention met in Chicago in 1968, thousands of protesters staged demonstrations against the US involvement in the Vietnam War. Chicago's mayor, Richard Daley, sent out 12,000 local police officers against the protesters and called in thousands more state and federal officers. The situation became a major riot between protesters and police that came to be known as "The Battle of Michigan Avenue."
The Scopes trials was about a him teaching evolution in schools which they didnt allow back then. You can compare it with them elementary schools not allowing teachers to read "Little Red Riding Hood" in schools