Franciscan rule codified two official postures toward Muslims, humble or confrontational

Evidence

The rule specifies that there are two ways to live among the Saracens: either humbly, avoiding dispute and confessing to be Christians, or boldly preaching the Word in hopes of converting them. To the latter, the rule enjoins steadfastness and courage: a string of Gospel citations reminds them not to fear martyrdom. — John V. Tolan, Saracens, 1109