With respect, that's her job. An ambassador is there to represent the policies of the government which sent him.
If Ms. Patterson is representing bad policies, that problem points right back to the head of government who sent her: Barack Hussein Soetoro 0dinga Whatever 0bama.
You are absolutely correct is identifying Patterson as only the implementer of admin policies. But when Morsi and the MB go south and there’s chaos in Egypt or there’s a new non jihadi govt, you can bet the underside of Obama’s bus will have a new admit.