Angels in America review – Tony Kushner’s five-hour fever dream predicts and reflects the US at 250

King’s theatre, Edinburgh People, ideas and scenes wash over each other in Ivo van Hove’s masterly staging at the Edinburgh international festival Could Tony Kushner’s sprawling fever-dream of a play now have come of age? It is 35 years since the two-part epic had its premiere in San Francisco when the memory of its Aids-crisis setting a few years earlier was still acute. Today, enough time has…