Irish monks that may have reached North America under St. Brendan and are reported to have been in Iceland when the Vikings arrived there in the 9th century are a possible suspect. The Vikings are a possible source for a European influence but would have espoused war rather than peace. Basque fisherman are another possible source of xstian influence and there is the possibility of priests hitching a ride to the New World with them. The Knights Templar are another possible source as their fleet slipped anchor the night before they were purged by the French king because he owed them so much he could never pay them back, the fleet was never seen again so possibly it went to North America. The stories I have heard about Hiawatha was that he was the Peacebringer who united the 5 tribes, no Jesus character required. Certainly the Mound Builders, Aztecs, Mayans and Incas were more advanced as civilizations by the time the Europeans showed up to bring their age of enlightenment to the native americans.