Education...You learn how to read...And compare what someone says with what you are reading...
How do I "compare" without using logic? If it were as blisteringly obvious as you imply it was, then the Bereans would not be singled out for their astuteness. Clearly there is some matter of interpretation and logical argumentation going on.
If what Paul presented was not a radical new interpretation of the Jewish Scriptures, then the Jews themselves would have all recognized and followed Jesus.