Indonesian President Joko Widodo lashed out at politicians for stoking a huge protest by Muslims that briefly turned violent on Friday night as a hardcore group pressed for the resignation of Jakarta's governor, a Christian they say insulted the Koran. The first ethnic Chinese politician to lead this sprawling city of 10 million, Basuki Tjahaja Purnama is standing for re-election in February, competing with two Muslims for the job. The governorship of the capital is a powerful position and it was a stepping stone for Joko Widodo to the presidency of the country two years ago.