Are you aware of what fealty means? What is your question asking?
Further, my understanding is Warmbier ripped down a political banner, not the North Korean flag.
Furthermore, if some idiot stole a flag from the White House lawn and the US Secret Service apprehended the person, I'd like to think the person's treatment at the hands of federal law enforcement officials wouldn't cause the detainee to suffer cardio-pulmonary arrest and those same LEOs wouldn't keep the person's whereabouts and status unknown to the person's family until, almost literally dumping his body on the unsuspecting family 17 months later.