It’s a windy, rainy night in Tel Aviv and half a dozen Sudanese asylum seekers in wool hats and winter coats are huddled together around a table, reading out loud a New York Times article about gun control in the U.S. Yael Rahani, their Ukrainian-born English teacher, in tight jeans and shiny silver nail polish, is correcting their pronunciation in heavily accented English of her own while scattering...