There's actually a pretty complex matrix in religious disagreement with or without exclusivity. And not all religions are exclusive at all. Islam's views of other Abrahamic religions is complicated, but it is exclusive about non-Abrahamic religions. Christianity sees Judaism as having been correct, but incomplete. Hinduism isn't essentially exclusionary (particularly to other religions which evolved from old Vedic practices), but is often confused with modern Hindu nationalism, which is. And even within single "religions" there are complicated lines where e.g. some Christians consider themselves to be in "communion" with some Christians, but not others.
So, yeah, bad example. It's a terrible thing to have pulled out to try to show clear mutually exclusive groups.