determined to return the church to its pre-lutheran state , and to destroy heresy entirely , he used the inquisition with increasing frequency , extending the definition of heresy to cover any form of immorality or sin , persecuted the jews and founded the index of prohibited books in 1558 , placing at the top of his list jewish books and works by erasmus , who , whilst supporting the broad aims of luther and the reformation remained vigorously opposed to the resultant bloodshed and repression .