Complex sentence: Father Cholenec introduced whips, hair shirts and iron girdles, traditional items of Catholic mortification, to the converts at Kahnawake so they would adopt these rather than use Mohawk practices.
Split into simpler sentences: Father Cholenec introduced whips, hair shirts and iron girdles, traditional items of Catholic mortification, to the converts at Kahnawake. He wanted them to adopt these rather than use Mohawk practices.