Because the match it's not a simple bout between athletes. It represent proud and nationalism from both countries that involved in the cold war.
At that time, America and the Soviet Union competed at almost anything to show the world which has the better system. Joe Louis was the boxer that represented America, while Max Schmelling was chosen to represent the Soviet union.
Explanation:
In his Second Treatise of Government, Locke identified the basis of a legitimate government. ... If the government should fail to protect these rights, its citizens would have the right to overthrow that government. This idea deeply influenced Thomas Jefferson as he drafted the Declaration of Independence.
It effectively overturned a Florida law demanding a recount which ended up Bush winning.