Dear Chas:

It is common for Protestants to think the Nephilim were fallen angels mated with humans, but that is errant theology.

Angels are pure spirits, but not as God is spirit. Angels are created beings. When God allows it angels can take human form, as they did with Abraham. When in human form they may eat and drink and be touched, but since they are actually angels food will not digest, nor will they eliminate, neither do they have sperm to impregnate. After the Resurrection of Jesus, he appeared in body, but he was not mere body. He "appeared" to the apostles without coming through the door. He, also, could be touched and could eat, but his body not go through the digestive process.

Yes, there are legends that the Nephilim were giant in stature. But, as I mentioned in the previous Q&A you referenced:

Here is the Navarre Bible Commentary on the Genesis passage:

Alluding perhaps to a myth in vogue in ancient times, to the effect that giants were the offspring of women who mated with beings of higher order, the sacred writer is stressing here the headway that sin and disorder have made. In this passage we are told that God put a limit on man's lifespan as a punishment for sin.

We cannot quite work out what the expression "sons of God" means here. Jewish tradition and some ancient Christian writers read it as meaning fallen angels; but that explanation does not fit in with the spiritual nature of angels. Therefore, it has been interpreted as meaning good men, the descendants of Seth who indiscriminately took as wives descendants of Cain, here called "daughters of men". This is the explanation given my St. Augustine (De civitate Dei, 15, 23), St. John Chrysostom (Homiliae in Genesim, 22, 4; St. Cyril of Alexandria (Glaphyra in Genesim, 2, 2) and other Fathers. Mankind's moral decline on account of pride and abuses of marriage prepares the way for the upcoming account of the flood.

Bottomline: the most logical and probably meaning of this passage is that the term "sons of God" refer to the descendants of Seth, and the "daughters of men" refers to the descendants of the evil family line of Cain. The good family line of Seth, corrupted and began to marry from the evil family line of Cain. This would have happened only with a societal moral decline.

As for your friend, marrying a Catholic does not make him Catholic. He had to prove a valid baptism from some denomination and be confirmed to be Catholic. If he could not prove a previous baptism, he would have been given a provisional baptism by the Church.

If he does not remember that, or being confirmed, then he is probably not Catholic and may not receive the Eucharist. If somehow he was confirmed and does not remember, then he needs to contact the secretary of the parish to check the records, or the diocese, to make sure. This is important, since receiving the Eucharist without being in Full Communion is a serious sin.

What you experienced about your friend jumping all over the place is called the scatter-gun or shotgun technique. It is very common among Fundamentalist Protestants, or other anti-Catholics. The way to deal with that is to stop him and say, "We can talk about each of your questions, but one at a time. Which question do you wish to discuss first. Only after we discuss that question will we move on to the next."

It is obvious that your friend is not properly catechized. If he does not have one, I would buy him a copy of the Catechism and ask him to read it. There are various indexes in the back so he can look things up by topic. There is also a simplified version of the Catechism online.

Then, as he reads the Catechism, when he has questions, a discussion can begin from that.

We will pray for him, and for you as you answer his many questions.

Hope this helps.

God Bless,
Bro. Ignatius Mary