Mandos probably did not fully embrace the pacifist ways except i public, but did not have the strength to do anything about it util Satine's death. After which we have Maul's unsuccessful occupation (which saw a return to warrior-focused initiatives). Around this time the Protectors probably broke off to assist the Republic in training clone pilots and using Skull Squadron and what not (if they already hadn't been exiled along with Death Watch already). Bo-Katan became regent after Maul was driven off, and due to her Death Watch ties/warrior beliefs, this can also explain the resurgence in warrior culture
