All facts are beliefs.
Untrue.
They are not being intellectually dishonest. They are just being ignorant or wrong.
They have been told and choose to remain ignorant.
Someone who is aware that "facts" belong in the catagory of "belief", but who continues to say that "you don't have to believe a fact", would be intellectually dishonest.
Why wod someone believe that to be true?
What value are you adding?