Fundamentally isn't any religious belief in an omnipotent/world creating god creationist?

Oh yeah. This isn't a problem unique to Christianity.

but the thing about essentially all religious belief is that its not exactly falsifiable

I think the function of a belief system is to lessen fear in scary, doubtfull, uncertain, painfull situations. That's when an unfalsifiable happy ending brings comfort.

It's just that many of them were invented quite a while ago, and some things that used to be unknown and scary then, are now better understood or obsolete. No point in engaging in makebelief for those.