I agree he was coerced. With thousands of people coming to chop off his head, I doubt the atmosphere was one of a relaxing trip off to a vacation. He needed to be out of there, and fast. Thats so obvious.
He's just mad about the US not propping him up once again, and probably overestimated the support he'd have. I'm sure he can hop on an aircraft and go back anytime he chooses.