Which factor helped shift American opinion away from neutrality during world war 1?

One significant factor that shifted American opinion away from neutrality during World War I was the widespread atrocities committed by Germany, particularly the sinking of the British ocean liner RMS Lusitania in 1915, which resulted in the deaths of 128 Americans. Additionally, the interception of the Zimmermann Telegram in 1917, in which Germany proposed a military alliance with Mexico against the United States, further inflamed public sentiment. These events, combined with economic ties to the Allies, ultimately led to increased support for intervention in the war.