I have included 2 videos. One is made by a Christian working to prove that some stories in the Quran were taken from Jewish and Christian apocryphal works dating from the 2nd to 5th Cent. CE. These sources are works that were never included in the accepted canon of the Bible.
The second of these videos is a Muslim response to the video. Feel free to add to either side of the argument.
Is the validity of the Quran compromised if some of its stories were included in non-canonical works?
The Muslim man says that these claims have been refuted. If you are aware of references for these rebuttals please share this information with me.
God's blessings to you all!
Here is the source for the rebuttal of the Cain and Abel story