How many jewish people do you meet at the supermarket who look like that? Or rather, how many people do you see in the supermarket who you can tell they are jewish?
There are many 'tells' from facial expressions and body language in Jewish culture - many of them are observable even to a non-Jew like me. If I spot these tells, I might think 'possibly Jewish', but without any negative feeling about it.
Jews have been demonised for hundreds of years, driven out their countries, subjected to slavery, genocide and oppression. It's innate that they have an ongoing fear, and that's completely understandable.
When I think of my experiences of what I heard as a kid were that Jews had big noses, the men were all circumcised (and that was funny right), they were tightfisted. Even 'shrewdness' with money was a stereotype that was seen as a negative. There were so many jokes being told around this, because Britain has a problem with structural or systematic racism that we have never managed to deal with.
And if your name is Goldstein or Silversmith for example, you still can't hide. The fact that people feel they have to change their family name in order to stay safe is the 'tell' that racists should learn from?
Not that I think of every facet of every race should be placed beyond criticism. I can level a criticism against Jewishness without being prejudiced against any Jews, and without mentioning Israel (that being the go to trope to attack the integrity of British Jews) It's just something I wish they wouldn't tend to do, and Baddiel does it all the time.