tones of the comeing war

the tone of the united states seems very offended and surprised that the Germans would do such a thing as sinking a ship with Americans on it and seems like there telling the public "don't worry we are gonna make them eat those u-boats" the Germans responses seems like there are worried a bit because they already are dealing with the English blockade and now they have to deal with the Americans as well. they also seem very angry and surprised that the American will break the peace and join the fight after being neutral for so long