Why did the Spartans laugh at the fact that Alexander the Great wants to become a god?

This is due to the fact that Alexander demanded that they worship as a god, but the Spartans were very proud, especially since they did not believe that the king of Macedonia, suddenly, became a god. It is known that after his triumph, Alexander the Great began to demand respect and worship to himself as to a god, which caused strong discontent on the part of his associates, who certainly knew that their king was not any god.