I don't think he could have made those comments to everyone (too many people), and I think it had specifically something to do with that girl holding her sign in front of the cops and me taking a picture of it. The girl was moving with the crowd, and just stopped there for a short while (because it was a place where her sign would come to life). So I might have been one of very few to take a picture of her (if not the only one).

I'd also add that I was kind of jeering and making little cocky sounds of laughter when taking her picture, which probably got Mr Super Robocot annoyed and prompted his intimidation speech.

That's part of the problem with cops. They act like thugs just because they know the law is on their side.