Judah laid with his daughter-in-law Tamar. Eventhough it states that he went into her tent believing she was a harlot. What was he doing in that tent anyway?

David's children Rehoboam and his descendant Asa were guilty of mingling with their mothers and 1st cousins.

David was said to have taken Abigail who was the wife of Caleb, now one Abigail is also stated to be a relative of his son Absalom's mother Maacah (A Giant as it is stated in the bible 'Daugter of Anakim'. AndAbigail was listed as being the sister of Zeruiah and David by Jesse.

Simeon is recorded in one outside source either in Josephus or Jubilees, as being the father of his sister's children Dinah.

Abraham married to his sister Sarah, 2 other sources the Book of Bees and the Book of Jasher/Jubilees claims she was his niece not sister.

The whole lineage leading up to the flood claims that these men intermarried with their brothers children.

The Jewish doctrines claim that Cain and Abel practice gross incest with their sisters

Lot's daughters deceive their father into providing them with children.

Reuben lays with Jacob's handmaid

And the list goes on. So how is it that the God of the nation of Israel was supposedly freeing the land of Canaan and punishing Egypt for sexual violations when Israel were guilty of all these things.

Besides contrary to Jewish belief, Cain obtained a wife after he was cast out not before, therefore he was not guilty of incest according to the English versions.