I think the comment you are replying to is saying that the area the cops let those people into was either already over run and they were moving to a different place to keep people out. Or that it was area the people were allowed to be in, hence the other non cops in the area and so it’s not a problem that they were let it. Not that the cops were just abandoning there job and letting people into an area they shouldn’t have.

I have no context for where this is and if it’s true but I think you are misrepresenting the above comment.