In the videos I have seen, I did not see any attempt made to ask the protesters to move. On the other hand, they are from far away, so I have no idea if the park police had gone through and asked them to make space.
I mean, people know that if the President is going somewhere, the secret service has teh right and authority to move anybody they want, block any streets, etc. I’m just not sure it was a good look. It doesn’t hurt to be nice to peaceful protesters, and seems like it makes it easier to attack violent protesters later.
The Park Service has quite clearly stated:
The protesters were asked to move. Three times.
The protesters (at least some) responded with violence.
Now, I would agree that if the Park Service does not have video evidence of the above, they were rather ill prepared, naïve, or both.