As a thought exercise, if some nation decides to roll the dice and arrest Putin. What exactly do people expect to happen next? Russia would just shrug and just go onto a vice president and accept that we arrested their president? Or nuclear blackmail? Nuclear attack? Retaliatory kidnapping of leaders in those countries? I predict arresting the leader of Russia would not go nearly as smoothly as the idiots in the ICC and Washington in London believe.
Russia then captured several of their men and had their heads gift-wrapped, or so the story goes.
Anyway, even the Italian Mafia was in awe and feared the Russians.