▁against ▁Luther , ▁and ▁Luther ▁ret orted ▁with ▁an ▁attack ▁on ▁Em ser ▁which ▁out did ▁in ▁sc urr ility ▁all ▁his ▁po lem ical ▁writ ings . ▁Em ser , ▁who ▁was ▁further ▁em bit tered ▁by ▁an ▁attack ▁of ▁the ▁Leipzig ▁students , ▁im itated ▁Luther ' s ▁violence , ▁and ▁assert ed ▁that ▁Luther ' s ▁whole ▁cr us ade ▁origin ated ▁in ▁nothing ▁more ▁than ▁en m ity ▁to ▁the ▁Domin icans , ▁Luther ' s ▁reply ▁was ▁to ▁burn ▁Em ser ' s ▁books ▁along ▁with ▁Leo ▁X ' s ▁b ull ▁of ▁ex communic ation . ▁ ▁Em ser ▁next , ▁in ▁ 1 5 2 1 , ▁published ▁an ▁attack ▁on ▁Luther ' s ▁App e al ▁to ▁the ▁German ▁Nob ility , ▁and ▁eight ▁works ▁followed ▁from ▁his ▁pen ▁in ▁the ▁controvers y , ▁in ▁which ▁he ▁def ended ▁the ▁Roman ▁doctrine ▁of ▁the ▁Mass ▁and ▁the ▁prim acy ▁of ▁the ▁po pe . ▁At ▁Duke ▁George ' s ▁instance ▁he ▁prepared , ▁in ▁ 1 5 2 3 , ▁a ▁German ▁translation ▁of ▁Henry ▁VIII ' s ▁Assert io ▁Sept em ▁Sac r ament orum ▁contra ▁Luther um , ▁and ▁critic ized ▁Luther ' s ▁New ▁Testament . ▁He ▁also ▁entered ▁into ▁a ▁controvers y ▁with ▁Zw ing li . ▁He ▁took ▁an ▁active ▁part ▁in ▁organ izing ▁a ▁reform ed ▁Roman ▁Catholic ▁Church ▁in ▁Germany , ▁and ▁in ▁ 1 5 2 7 ▁published ▁a ▁German ▁version ▁of ▁the ▁New ▁Testament ▁as ▁a