Why do all our favourite, talented (e.g. Jim Carrey, Richard Gere), much acclaimed film stars (e.g. Meryl Streep, Sally Field) and actors of lesser fame get so emotionally extreme politically – especially about Donald Trump? Why is it that they can deliver performances to move us with the humanity of their characters, bring us to tears even, yet behave like ugly thugs wanting to smash him in the face (Robert De Niro), decapitate him (Kathy Griffin), shoot him (Johnny Depp) or blow him up in the White House (Madonna)?

Perhaps it’s because actors singers, performers and artists of all kinds live...