Latitudinarianism

Lat`i*tu`di*na"ri*an*ism (?), n. A latitudinarian system or condition; freedom of opinion in matters pertaining to religious belief.

Fierce sectarianism bred fierce latitudinarianism.
De Quincey.

He [Ammonius Saccas] plunged into the wildest latitudinarianism of opinion.
J. S. Harford.