MATTI FRIEDMAN What I find most remarkable, having lived here for the past 23 years, is Israel’s bewildering and fast-moving society, the complexities of which are usually overlooked by observers. The question of what “Israeli” means in 2018, and how that’s changing and why, are particularly important ones at this anniversary. One good way to answer is to listen to pop music. But the singer in a shiny white gown who belted out a cover for a national TV audience was Sarit Hadad, one of Israel’s biggest pop stars and the queen of a genre called “Mizrahi,” or “eastern.” In...