I do agree that beliefs are a form a knowledge, but we do have to distinguish between assertions of knowledge that are not dependent on observation for their validity, such as believing in God or believing in the moral equality of all human beings (both of which I share), and observational knowledge. Beliefs can have implications for material existence, by influencing how people live their lives, but cannot refer to it for verification.

As "Gettier Problems" illustrate, we do have to recognize that all observational knowledge is provisional, and we can never presume that anyone else's perceptions are the same as ours, but that does not obviate the essential difference between assertions of knowledge that are not dependent on observation for verification and observational knowledge.