"Family intermarriage was allowed by God during those early years."<quoted text>
Family intermarriage was allowed by God during those early years. God later changed this in Leviticus. This was no problem for their genetics at that time.
The point of females marrying ASAP is the family and no single women thus endless fornication and sex immorality as we see today. The men, like Jesus, stayed with their family until older able to support themselves. The young men are often unable to support themselves. Jesus was 30 before getting baptized.
Absurd, but if that's all one has, then so be it.
10 to 1 this one runs to a medical science doctor when he gets sick, and not to the Bible like a Christian Scientist who actually walks the talk.