It was the performance of a lifetime. Selena Gomez in a stripped-down production: The Tears of a Clown. In a video posted to Instagram earlier this week, the actress pointed the camera at her face and let the waterworks flow as she struggled to eke out words. Women-crying-on-camera has become its own pathetic genre of social media — a transparent and performative plea for attention or sympathy. But this one, aimed at President Trump’s immigration raids, was a doozy. “I’m so sorry, I wish I could do something, but I can’t,” said Gomez, whose paternal grandparents are originally from Mexico....