Church bans on Jewish doctors were repeated for centuries because Christians ignored them

Evidence

In the twelfth century, the use of Jewish doctors by Christian patients was firmly condemned in the compendium of Canon Law assembled by Gratian—the Decretum Gratiani—and Christians who did seek remedies from Jews were theoretically threatened with excommunication. Similar injunctions, often re-stating the interdiction made in the Decretum Gratiani, were issued by various Church councils held in Spain during the fourteenth century, but their very existence only seems to confirm that they remained largely ignored in practice. — James Renton, Ben Gidley (eds.), Antisemitism and Islamophobia in Europe, 364

Categorization

• XREF: Connects to the pattern of sumptuary and dress laws repeatedly re-issued because unenforced, as in the author’s article on immodesty moral panics.
• ADDENDUM: The ‘repeated precisely because ignored’ pattern parallels the Lex Oppia and similar repeatedly re-promulgated sumptuary laws in the author’s immodesty article.