This time I'm not. It's fine to have weapons drawn but keep them pointed in a safe direction. It's gun safety 101 but for some reason pigs are exempt.
The fact that they're battle ready pointing their weapons at every civie in the casino is interesting, meaning they were expecting a firefight. Police don't do this to anyone unless they're threatening the police, or are suspects committing a crime. Even in a situation like this, they would either ask all the civies to leave and line up, or just walk through there without asking anything of them and telling them to remain calm.
This isn't part of any fucking police, SWAT, or domestic military protocal when dealing with a domestic mass shooting. They were acting like the people there were the enemy and not innocent civilians. You don't do that as a public servant of any kind unless you're in a warzone or in a literal firefight.
Even if they were just escorting someone higher up, they wouldn't be acting like that. Their weapons would be at the hip in resting position, not in firing position. Something is very fucky.