Why did sinking of Lusitania push US into world war 1?

The sinking of the Lusitania in May 1915 was a pivotal event that shifted American public opinion towards entering World War I. The British ocean liner was torpedoed by a German U-boat, resulting in the deaths of 1,198 passengers, including 128 Americans. This act of unrestricted submarine warfare heightened tensions between the U.S. and Germany, as it exemplified the dangers posed to American lives and commerce. The incident galvanized calls for U.S. intervention, contributing to the country's eventual entry into the war in 1917.