According to the german constitution germans are not only allowed but required to kill unelected heads of government.
Although I'm Swiss, I would do the same. Every Swiss person has to enter the Military and it's a societal contract that our militia is there to keep the democracy alive.
Yes and no. Every Swiss male has to serve in the military. You are allowed to compensate for it instead, but there is still a Wehrpflicht, that doesn't change. Just that the compensation is Part of the Wehrpflicht.
You can also be arbitrarily deemed "unfit for service" and forced to pay a pretty expensive compensation fee for the next several years, even if you would have preferred to have done the months of military or year of civil service instead.
you can't anymore actually. There was a ruling of the Europäischer Menschenrechtsgerichtshof (I think that's how it's called?) (not the one of the EU but the one of the European Council) that that was discriminatory and they legally have to allow everyone to serve.
It was in an official document on the official website (I think of the Kanton Luzern?), so it certainly isn't a fake. I can possibly find it for you again if you want to.