Look, it's a matter of faith, and your web page admits this:
The starting-point for these researchers is that the gospels can't be true! They start from the view that things like being born from a virgin, miraculous healing and rising from the dead can't happen and that's why they have to explain why the early successors of Jesus supposed that these things had happened. The simple and reasonable explanation that these matters really have happened is not regarded as a plausible \ufffdexcuse."
This is simple, childish argument by assertion. That's not an explanation in any reasonable sense of the word.