De or het islambeleving?

The correct Dutch article is:

de islambeleving

Rule Words ending in -ing: almost always de. See the rule

How to use islambeleving

the islambelevingde islambeleving
this islambelevingdeze islambeleving
that islambelevingdie islambeleving
our islambelevingonze islambeleving
your islambelevingjouw islambeleving
every islambelevingelke islambeleving
which islambeleving?welke islambeleving?
a big islambeleving / the big islambelevingeen grote islambeleving, de grote islambeleving