By way of background ....
At the table next to us at lunch today there was an English family. I knew they were English because they were talking VERY LOUDLY and VERY SLOWLY at the lovely waitress whom we have got to know quite well. They were treating her as though she were some form of educationally subnormal person for not knowing English. Without making any sort of effort at all.
They were also wearing Crocs. All of them. I hasten to add I am (or was) agnostic on the subject of crocs. Until today.