USA never went to war with Japan except words,,,,before 7 Dec 1941, and yet they were both at war all of a sudden. In case you dont know during Iraq Iran war there were many skirmishes in persian gulf between USA and America, Iran even lost a passenger aircraft to american anti aircraft missile. there is a tension between both countries since decades, and Iran and Israel are at proxy war with each other since decades, see what is happening in Syria. Israel is striking irani targets inside Syria for too long now and Iran is replying by supplying SAA and Hizbullah... so your argument is invalid.