, ▁the ▁book ▁became ▁a ▁major ▁best s eller . ▁As ▁a ▁result , ▁Gold stein ▁and ▁A very ▁were ▁repeatedly ▁s me ared ▁by ▁the ▁Social ist ▁press ▁and ▁compared ▁to ▁Jud as ▁Is c ari ot . ▁If ▁anything , ▁this ▁only ▁strength ened ▁their ▁decision ▁ ▁to ▁defend ▁their ▁country ▁against ▁what ▁they ▁saw ▁as ▁a ▁total itar ian ▁ide ology . ▁ ▁So on ▁after , ▁they ▁both ▁decided ▁to ▁convert ▁to ▁Catholic ism ; ▁she ▁in ▁ 1 9 0 4 ▁and ▁he ▁in ▁ 1 9 0 5 . ▁Both ▁became ▁involved ▁with ▁Fr . ▁Peter ▁Diet z ' ▁Milit ia ▁of ▁Christ , ▁a ▁movement ▁to ▁in oc ulate ▁Catholic ▁workers ▁against ▁the ▁in ro ads ▁of ▁social ism ▁and ▁commun ism ▁into ▁the ▁union ▁movement . ▁Gold stein ▁began ▁using ▁the ▁Boston ▁School ▁of ▁Political ▁Econom y ▁to ▁public ize ▁his ▁opposition ▁to ▁social ism ▁and ▁commun ism . ▁As ▁a ▁social ist ▁and ▁a ▁Jew ▁who ▁had ▁converted ▁to ▁Catholic ism , ▁Gold stein ▁quickly ▁became ▁a ▁sens ation ▁in ▁Catholic ▁circles , ▁and ▁rose ▁to ▁become ▁a ▁prominent ▁lect urer ▁around ▁the ▁United ▁States ▁for ▁the ▁Milit ia ▁of ▁Christ . ▁ ▁Gold stein ▁also ▁became ▁deeply ▁involved ▁in ▁evangel izing ▁the ▁Jews , ▁author ing ▁several ▁prominent ▁books ▁and ▁tract s ▁designed ▁to ▁be ▁used ▁by ▁Christian ▁apolog ists ▁working ▁with ▁Jews . ▁He ▁founded ▁the ▁Catholic ▁Tr uth ▁Gu ild ▁in ▁ 1 9 1 7 ▁along ▁with ▁Mar tha ▁Moore