American diplomats are supposed to represent the nation, advocate for the interests and policies of the U.S. government, and stay on generally good terms with the country to which they're assigned. Even when they are sent to places that have an adversarial relationship with the United States, they are expected to maintain decorum while conveying messages these regimes may not want to hear.
Trump stated, 'I TOLD THEM TO STAY AWAY, UNLESS THEY JUST WANT TO LOAD UP THEIR SHIPS WITH OIL.' He criticized NATO nations for their lack of timely support during the crisis.