because the bishops were politically very important, whoever controlled them had a great deal of power. THIS OBVIOUSLY CAUSED A STRUGGLE FOR POWER BETWEEN POPE GREGORY VII AND EMPEROR HENRY IV. THESE CONFRONTATIONS WERE FINALLY RESOLVED AT THE CONCORDAT OF WORMS, WHERE IT WAS DECIDED THAT THE POPE ALONE COULD NAME A BISHOP, BUT THE KING HAD THE POWER TO VETO THE APPOINTMENT.
The American Revolution was principally caused by colonial opposition to British attempts to impose greater control over the colonies and to make them repay the crown for its defense of them during the French and Indian War (1754–63).
Justice Frank Murphy opposed the majority. He believed that military necessity was merely an excuse that could not conceal the racism at the heart of the restrictions. Hope this helps! :D