The United States tried to remain neutral in the First World War, but it provided far more trade and financial support to Britain and the Allies, which controlled the Atlantic routes. Germany worked to undermine American interests in Mexico. In 1917 the German offer of a military alliance against the U.S. in the
Zimmermann Telegram contributed to the American decision for war.
[5] German submarine attacks on British shipping, especially the sinking of the passenger liner
Lusitania without allowing the civilian passengers to reach the lifeboats, outraged American opinion. Germany agreed to American demands to stop such attacks but reversed its position in early 1917 to win the war quickly. Berlin mistakenly thought that the US Army and Navy were so weak that they would not play a decisive role.
The US public opposed the punitive
Versailles Treatyof 1919, and the two countries signed a
separate peace treaty in 1921. In the 1920s, American diplomats and bankers provided major assistance to rebuilding the German economy. When Hitler and the Nazis took power in 1933, American public opinion was highly negative. Relations between the two nations turned sour after 1938.
Germany–United States relations - Wikipedia
I unno maybe you can point out the United States supporting Hitler.