Just look up Hitler's speech after Japan declared war on America. He explains all the bullshit America was doing that went against international law from the lend lease to attacking German ships, dogging ships and forcing them to scuttle themselves, aiding the british, arresting diplomats and so on. They wanted war with Japan and Germany and were doing everything possible to force the issue. Look up the navy personnel that were sacked when they questioned the stupidity of moving the navy to Pearl Harbor and how vulnerable they were. You can find the sources for whatever you want with simple google searches.