There has always been support for people that are extreme in their actions towards those who hold power that's why we are fascinated with western outlaws, Mafia/cartel bosses to highway man they have always held fascination and often celebrated and romanticised
even if we do not agree with their actions we often admire their rebellious nature to take on those in power
I am not one bit surprised he is being held in high regards by so many people
could it happen here, yes under the right circumstances
there have certainly been ex PM's who if they had been assassinated those guilty would have been considered heroes, I clearly remember the discussions after the failed attempt to kill Thatcher