misjudgement
Was it though? You couldn't pay me enough money to chance a visit to a country like Egypt with a pedigree like his. International politics is a nasty business and when you step up to certain levels for certain players you don't get the luxury of being a bystander.
The response is easy: any and all goods clearing customs with Egyptian owners gets detained for two weeks with inspection assessment charges. If they know of Egyptian assets in-country now would be a good time for them to have "accidents." Make visa applications harder, PNG embassy/consulate staff, or even close down any extra missions. There's lots of options for retribution.