Fair enough. I just feel as though there are extenuating circumstances surrounding his specific case. I believe that his due process was rather not denied, but expedited due to his own behavior. His due process took place in a briefing room of national security advisors discussing what violence he could be capable of before international police were able to capture him. I believe that he knew that his status as a US citizen would shield him from military action for some time and would be willing to use that time to orchestrate further attacks on western civilians for as long as possible.
I liken it to a hostage situation at a bank. A group of people commit armed robbery and 2 of the 3 have killed civilians. So in response they were killed by a SWAT team. The ring leader is the only one left and is holding hostages in a room with no windows, but is able to communicate with a negotiator. The orchestrator tells the negotiator that he has no intention of killing people but is holding hostages to ensure his safety. There’s already been lives lost so how willing are you to allow him to negotiate an arrest without further casualties? He’s holding hostages with the threat of violence but hasn’t killed anyone yet. Eventually he is killed without incident by law enforcement and the hostages are brought to safety. Is that situation a denial of due process by a court of law?