revision preference src: Most Breslover Hasidim do not use Na Nach Nachma (some groups actually oppose it) and not everyone believes it is an authentic writing from Rebbe Nachman. <SEP> tgt: Most Breslover Hasidim do not use Na Nach Nachma (some groups actually oppose it). Not everyone believes Na Nach Nachma is an authentic Na Nach Nachma from Rebbe Nachman.