I voted for domestic violence against child (I would assume that those would be our children, since I’m married with children), major assault, murder and serial murders.
The domestic violence against child offence would have to be a repeatable offence though, not just the one time. Unless the domestic violence was something really horrific like holding their face to a hot plate.
Honestly, treason and espionage don’t seem like a big deal to me. Suppose I am a citizen of country X engaged in a war against country Y. If someone in country Y is committing treason and giving me their secrets, they’re supposed to be a good guy, but if someone on my side does the same, they’re a criminal? Doesn’t make much sense really.