Sects, as in different paths of the same religion, calling themselves followers of that religion while being different to other groups also calling themselves followers of that same religion.
As an example, Baptists and Methodists each consider themselves christian, but a baptist is not a methodist and vice versa.
The catholics have their own church elsewhere in MK.
The muslims would have a mosque up the road nearer the canal, after knocking down the current church there, and the christians could use the old church in the town where there is plenty of parking, and would bring in more funds to keep the old building in good condition for prosperity.
I suppose we could shut down all churches and insist they all use the cathedral, but as it has no roof, or windows, or walls for that matter, I can't see it being very popular during the winter, or on rainy days. Course I wouldn't mind getting married there.