Whatever medieval Jews said, or thought, about Christianity, one may be sure that very little of it was good.
Embracing Death, Celebrating Life: Reflections on the Concept of Martyrdom in the Order of the Knights Templar
Although research on the concept of martyrdom during the era of the Crusades has gained considerable prominence, it has rarely been applied to the Knights Templar. This is surprising, as the Templars were the first military order and paved the way for a new monastic development; they were devoted to warfare only; and they, together with the other military orders, but unlike most Crusaders, established a permanent presence in the hostile environment of the Holy Land, consequently facing the threat of death both regularly and frequently.
A Comparative Analysis of the Concepts of Holy War and the Idealized Topos of Holy Warrior In Medieval Anatolian And European Sources
It is somewhat surprising that we find very little in the way of propaganda bent on stressing positive changes that Christianity could bring, propaganda of the kind that Bishop Daniel of Winchester scripted for Boniface in the oft-cited letter which he advised the missionary to lure converts by contrasting the economic prosperity of Christian communities with the backwardness of the non-Christian.
In the Middle Ages, Polish Christian holidays remained consistent, except for minor temporary deviations. They included the basic structure of pre-Christian rituals. Yet, traces of the old Slavic ritual calendar can be clearly identified in the Polish and Czech sources from the fourteenth- and fifteenth-centuries.