A London festival has invited a controversial commentator to appear at the event despite saying he would "vote for Hamas over Israel" and that the "US deserved 9/11".Hasan Piker is listed among the speakers at “How the American Left Learned to Speak the Internet” at London SXSW in early June.Mr Piker has faced a backlash over some of his comments, including reportedly saying on a livestream in 2019 that “America deserved 9/11”, which he later ac…