My first reason why America should not have gone to war is, this was not our war. This war was between Europe and it should have stayed within Europe. The Royal Navy was on the brink of ending the war before we even decided to go. If we stayed out of it, then Europe could have found their own way to put aside their grievances end the war and begin to rebuild and heal.
My second reason is the U.S used the sinking of the Lusitania as a reason to engage in the war but in my opinion