Why are police so rude??

I was riding to the manipal marathon at 4am last Sunday and two wheelers were parked all over and there was police patrolling the area. When someone tried to park at the front (there were a lot of vehicles parked there) the police rudely shooed them away like they were street dogs or something. Like wtf, how would you know you're not supposed to park there, there's no signs or anything. If anyone tried to get close to that area this big ass mustache cop loudly cursed at them and told them to get lost. Can't he be a little more polite? People innocently looking for spaces to park and had to listen to this guy's ugly curses. They're random innocent people, some of them who may have achieved a lot more than this guy ever did. They don't deserve to be shouted at like that. So rude.