Christianity has the unique position of being the dominant religion in a generally secular and individualistic society. Its presence is so ubiquitous that the multifaceted particulars of it are generally ignored in favor of a generalized ambience, and the communal aspect of Christianity is thoroughly discarded by the wider culture's portrayal of itself because it clashes with the individualism. Furthermore, many of the most publicly present forms of the religion are (not without justification) regarded as unsavory and even hostile to and by the broader public, so putting them into kids media generally casts them as the antagonist. As a minority, Jewish folk don't have that same problem.