After Bradley Cooper’s prosthetic nose in the trailer for the upcoming Leonard Bernstein biopic “Maestro” stoked criticism of antisemitism, the conductor’s children have come to the defense of the actor. The teaser trailer for “Maestro,” which Cooper directs and stars in, debuted Tuesday and offered the first close-up look at Cooper’s makeup and performance as the great American composer and longtime music director of the New York Philharmonic. Cooper, who is not Jewish, dons a prosthetic nose as part of his transformation into Bernstein, who was. To some, Cooper’s nose in the trailer seemed like the kind of outsized caricature...