During the Age of Exploration, both the Spanish and the French sponsored groups and sailors who would set out on missions to explore new land. The purpose of this was mostly to find gold and other goods.
The Japanese valued art, literature and life their garden of cherry blossoms are beautiful in paintings and real life.
These are the circumstances under which the protest of the students in Tinker v. Des Moines would be deemed unprotected speech:
if their action had clearly threatened order and safety.
And since it didn't, there was no reason for it to be deemed unprotected speech.
He used this to keep the communists away because they were weaker than us and could not afford to be attacked; we could.