By Greg Gilman LOS ANGELES (TheWrap.com) – Jay-Z responded to critics of his Cuba trip with a song called "Open Letter" and now "21 Jump Street" director Phil Lord has responded to the song with an open letter of his own, blasting the rapper for "being a bad artist." Although Jay-Z's Cuban excursion with his wife, Beyoncé, and both their mothers was approved by the U.S. Treasury Department, Lord – the son of a Cuban refugee – told the Huffington Post that the rapper's newest single upset him to the point where he had to speak his mind. …
