Let me give you an analogy:
Followers of the religions are akin to the students in the schools.
They study hard to understand what is in their text book.
Once they understood the text book they claim that they have mastered the subject while being oblivious to the fact that there are other students in other schools who are following other text books that have different content apart from new discoveries being made by the scientists everyday that may have made the content that they studied obsolete.
On the other hand Hindus are akin to the scientists who have been discovering things over the ages that became contents in those text books. Yes scientists succeed sometimes and fail sometimes but their quest for discovery is unending. Hindus enjoy this freedom and accept the risk of taking this journey of self discovery. Each Hindu is challenged to discover truth for themselves.
If you ask a student what is his understanding level of the subject, the answer would be around 80-100% while if you ask the scientist the same, the answer would be less than 1%. So you calling Hindus ignorant does not surprise me at all.