Back when the annual Canada Strong and Free Conference, which wrapped up Friday, bore Preston Manning’s name, the Reform Party founder would usually take an opportunity to counsel the flock away from fiery rhetoric. He was most stern in 2013, when he warned at the Manning Conference that the conservative movement’s “greatest weakness” is “intemperate and ill-considered remarks by those who hold … positions deeply, but in fits of carelessness or zealousness say things that discredit the family as a whole.”