No human's knowledge is infallible, nor can it ever be. Your last paragraph looks like an argumentum ad ignorantiam fallacy to me, as logically no one needs to disprove a claim. Nor does simply asserting that you believe something is a fact, make it factual, and of course this:
"after thorough investigation of many years, I concluded that Baha’u’llah was from God and His knowledge infallible therefore unquestionably correct, factual and true."
Is a circular reasoning fallacy. If I claimed that after thorough investigation of many years, I concluded that Harry Potter was a wizard, and His wizardry infallible, therefore wizardry was unquestionably correct, factual and true. Would that be a compelling reason for you to believe Harry Potter was a real wizard? I'm guessing not, so perhaps you can see how your claim might look to others?