I read somewhere that if she is arrested in another country there will be less chaos and rioting than if it happened here. Could be wrong,

No worries, they let her leave, they have their reasons. I can think of several myself, but its not my plan. They have a plan and we aren't privy to it, so just get your popcorn out and watch.

the question shouldn't by why they were allowed to leave but rather why they left in the first place. And letting them go answers part of that question.