Protect the tax revenue

In the end, of course, the pagan temples did close and Christianity become, for many centuries, the only licit faith, although most peasants and members of the urban lower classes seem never to have been fully Christianized. Even so, to the extent that Europe was Christianized, it didn’t happen suddenly not did it involve substantial bloodshed; the latter was mainly limited to conflicts among Christians which sometimes resulted in military action against various heretical movements.— The Triumph of Christianity, page 192

<idle musing>
Follow the money! Tax revenue must be protected at all costs! How ironic...but unsurprising.
</idle musing>