“Giants were born when the Sons of God went into the daughter of men. How plain can God make it?”
The text does not say that.
It says
“There were giants on the earth in those days, and also afterward, when the sons of God came in to the daughters of men and they bore children to them. Those were the mighty men who were of old, men of renown”
1. There were giants then.
2. It does not say they were born to the sons of god.
3. The mighty men are shown as heroes, sons of the sons of God.
4. The giants are distinct from the sons of sons of God
OK, the way you read Scriptures, how were giants formed with 6 toes and 6 fingers that ate men and God wanted all of them dead? Would David kill one of God’s line of Seth? What was the last straw that made God Flood the earth? Was Seth a son of man or created by God? Why would a woman birth a freak by having sex with a man? If your unable to read what the Scriptures are plainly saying, is there other things you may have misunderstood?