And yet someone who is white, male and straight is not afforded the same level of protection against offense.
If I were a young white male from a poor working class background, struggling at school and maybe being raised in a single parent family I dare say I might find this offensive, openly displayed on a London street. And yet I don't see the creator being arrested.
Like I said, it depends on which group is currently in favour and right now following the death of the great Queen Elizabeth, the police are on the side of the monarchists. So our lovely Scottish friend heckling Andrew was bang out of luck on this occasion. He chose the wrong group to insult at the wrong time. He'd be better advised to insult white people at a BLM parade. The police would be taking the knee to him.