You're conveniently ignoring the remaining 5% (actually larger than 5% BTW), which is not only ahistorical and non-scientific, but is where the majority of the "moral teachings" you speak of are found.
Most of the moral teachings are told in the context of a story that may or may not have happened. Almost all of them you cannot prove they were "ahistorical and non-scientific"
Did Jesus resurrect? I would accept a "probably not", but it seems just as non-scientific and dogmatic as Christian beliefs themselves to suggest he absolutely didn't since it's a completely non-falsifiable.
So many athiestic views smell exactly like a religious view in disguise.
Also, I would note that many of the pillars of modern science were created by ardent Christians.
One example is Rene Descartes, who performed a thought experiment in complete skepticism: "What if all of my senses deceived me? How could I know what is true? What if I was completely deluded by some demon or something? Well the mere fact that I can ask this question, means I know I at least exist. I think, therefore I am. Cogito, ergo sum"
This is a [1] solid foundation of modern science, and as far as I can tell, everything else is "probably" true or not true. (there is a slight qubble that strictly speaking it would be "I think, therefore something thinks", since you shouldn't presuppose even "I" exists)
He later went on to write a proof of God. Your results may vary on that one.
