THERE’S NOTHING I like more than a Jewish joke. It’s the anti-Jewish ones I’m not so keen on. Wandering through the streets of Edinburgh during the world’s largest arts festival, you never know what sight or sound you will be bombarded with next. Half-naked men on 6ft stilts meander by, half-naked girls rush to sell you their show, troops of Japanese acrobats tumble past. But I wasn’t prepared for the verbal assault I got when I wandered into a comedy gig this week. There have always been anti- Semitic jokes. But you know times are changing when you go along...