I don’t even think she’s glaring. They all look like the sun is facing them.
However, I think anti monarchy protests are generally pretty good - and they’re a group who behave. Can’t see the problem with “not my king” or placards that object to the institution. And booing might feel personal but it’s not especially.
Diana and her children having the words WHORE screamed at them on the school run to try to get a photo of her looking shocked used to be quite standard and was grim.
I assumed there was a) going to be a photo of an actual glaring Princess of Wales and the sound would have someone shouting something mean and personal but there appears to be neither of those things. Literally nothing to see..