so the bible is a liar? Isa and Paul are liars? It's says that all not some but all and Isa says that we are not righteous no not one.
The infancy gospel is usually attributed to St. James, but may be of later origin. What makes you think it is made up?
The Bible is inspired inerrant scripture. For that reason it is important to read it carefully and understand it in context. If you do, you will agree that the context of Romans 3 makes it clear it is a generalization and not a prooftext of Mary’s sinfullness. Likewise with Isaiah, — the Bible makes many references to righteous people. Noah, for example, is described as “perfect in every way”.