To be fair, the Franciscans began caring for the poor and the sick, and that was not something you could do unless you had possessions: a roof and paraphernalia for helping sick and hurt people. So the Franciscans evolved into two groups: The Zelanti (from the word "zeal"), also called the Spirituals, and the Relaxati, later called the Conventuals.
The Spirituals' extreme views caused them to criticize the growing wealth of the Church and the lavish lifestyle of its top prelates. This put the Fraticelli on a collision course with the papacy, fictionalized by Umberto Eco in the book The Name of the Rose. In the book (and movie), we meet one of the Spirituals, Ubertino de Casale (seen above worshipping Christ).
Ubertino joined the Franciscans in 1273 as a 14-year-old. After a few years he was sent to Paris to study, but returned to Italy when he was done. He traveled to Rome, visiting Christian sanctuaries and sites, then settled in Tuscany. Considered very smart though eccentric, he soon became leader of the Tuscany Spirituals.
The Tuscany Spirituals were so extreme that they started to publicly claim that Popes Gregory IX and Nicholas III (who had been a friend of Francis) were heretics for not interpreting the Franciscan rule of poverty properly, and allowing moderation. Gregory had stated that gifts given to the Franciscans were in fact gifts to the pope, and the Franciscans were just using them temporarily. Pope Innocent IV allowed the Franciscans to appoint an outsider who would be in charge of buying, selling, and managing goods, like a quartermaster. The Spirituals did not approve of this way of trying to weasel out of Francis' original rule.
Of course, Ubertino was one of the loudest critics of the papacy and his fellow Franciscans, and the authorities decided he needed to be dealt with. We'll talk about that tomorrow.