I think you are right. They allowed shots fired.. then they took him out.

Devil's Advocate, we want them to clearly identify the target and what may be behind the target. Still seems a bit slow and sloppy, ngl. We also don't know how long the assassin was exposed carrying a rifle and taking a position before opening fire

How do we know the SS saw the gunman? They’re always scanning the crowd with the scope.

Who does the SS work for?

Good points. I believe there are MANY questions that need to be answered. I just don’t believe this video shows planned inaction.

Either the secret service is retarded. Or it was an inside job. That building roof should have been secured. There were very few places for a sniper perch, and that was so close and so obvious.