I believe there is a god (or some higher being). I also believe that humans are inherently imperfect, and that probably no religion (a manmade construct) has it correct.

If I believe my religion to be correct, then I must believe that other religions are incorrect. If religions can be incorrect, then my religion can also be one of the incorrect ones.

I will never fault anyone for their beliefs about a god, because then I must be faulted as well. Though god ≠ religion, and I am not a fan of some religious practices.

Believing that my religion could be incorrect does not affect my ability to practice my religion or believe in its teachings.