My understanding is that this is precisely the sort of behavior that the customary "political crimes" exemption in extradition treaties is supposed to cover. Th

My understanding is that this is precisely the sort of behavior that the customary "political crimes" exemption in extradition treaties is supposed to cover. Things like espionage, treason, separatism and other crimes against the state are inherently political. The UK-US extradition treaty also explicitly states that in the case of politically motivated prosecution, no extradition can occur.