No, you make the mistake that most people make of not understanding what is going on from the beginning. When you do not understand the beginning you are lead down a path that brings you to where you are today. A fragmented, distorted view of G-d based on a misunderstanding of what is occurring. A view or perception of a different G-d in the Hebrew Bible and the one who is seen in the N.T.
This misunderstanding primarily comes as a result of a deeply flawed assumption concerning both the intelligence and technology of the Antediluvian civilizations or more correctly the pre flood world. Because the world largely accepts without questioning the concept of Darwinian evolution, a highly advanced, technologically advanced, highly intelligent civilization dating from creation to the flood is incompatible with any Darwinian model. Because of this many/most "christians" can not conceive of the idea that ancient man in many ways was far more advanced than we are today.
It matters not if the "Sons of G-d" were angels that committed acts of abomination in the sight of G-d OR if the Sons of G-d spoken of in Genesis were the sethian "godly" line. The fact is that both man and animal DNA became utterly corrupted I believe as a result of mankind manipulating DNA. This illuminates the statement by G-d about how ALL FLESH had corrupted its way. After all HOW could an animal become "corrupted in its way?" The Only way this could have happened is if man was creating beings that were a perversion by mixing human DNA with animal DNA, or the DNA of animals not closely related (ex birds with reptiles or reptiles with mammals) resulting in the creation hybrids and trans-human beings. As a result G-d severely punished those angelic beings that departed from their "first estate" and wiped out ALL creatures that "had the breath of life" Noah, his wife and their 3 sons were pure genetically speaking but we have no evidence that suggests that their wives did not have corrupted DNA. I think it has to be the case because no where in scripture do we see even the mildest of hints that there was either the technology or an angelic incursion to explain the existence of nephillum on earth post flood. People try and argue that there are 2 accounts of the flood but this is inaccurate. The first account deals with only those animals that are classified as clean. A clean animal is both one that (later) can be used as food but also is an acceptable sacrifice to Adonai vs an unclean animal which can not be used for either purpose. This begs an obvious question. If the Torah/Law did not exist as some suggest how did Noah know the difference between clean and unclean? The answer is I believe the law was given to Adam from the beginning. I could go into detail as to why I believe scripture supports this view but it is outside the boundaries of the discussion at hand.
Satan from the beginning wanted to corrupt mankind's DNA as a means to prevent the coming of Messiah. In order to prevent that G-d needed to have a people who were "a peculiar people" who were set apart, who were bound to G-d and were not to intermarry with ANYONE not a part of Israel. It explains why in some Canaanite cites that were sacked why G-d allowed the children of Israel to take animals but were to destroy all the inhabitants, why in some they were allowed to take both animals and people and why in some that everything was to be destroyed. G-d was wiping out this corrupted DNA from the earth. It took almost 400 years from Joshua to David for this culling out of corrupted DNA in mankind.
The key to all of this is something Yeshua says in Matthew: "For the coming of the Son of Man will be just like the days of Noah. "For as in those days before the flood they were eating and drinking, marrying and giving in marriage, until the day that Noah entered the ark, and they did not understand until the flood came and took them all away; so will the coming of the Son of Man be."
when you look at the surface of this it seem like nothing is really being said. What is unique about eating, drinking, marrying and giving in marriage that we can use to identify anything as special or unique? The answer is we cant. For those things are true of EVERY generation... but why say "As in the days of Noah" and there in lies the key. What is unique about TODAY verse every generation since the Flood until THIS generation??? Man has rediscovered how to manipulate DNA. We hear science touting trans humanism and presenting it as something to achieve... just like the days of Noah.
What was the tower of Bable really about? Do you really think that Adonai was ticked about a building? No.. it had nothing to do with the building but rather what it represented... they wanted to return to the knowledge they possessed before the flood. Which we see clearly when G-d says The LORD said, “Behold, they are one people, and they all have the same language. And this is what they began to do, and now nothing which they purpose to do will be impossible for them.
7“Come, let Us go down and there confuse their language, so that they will not understand one another’s speech.”
8So the LORD scattered them abroad from there over the face of the whole earth; and they stopped building the city.
They wanted to recreate the science they lost in the flood. When you see Genesis in this light G-d become remarkably consistent and his actions make sense in stopping Satan's efforts to prevent the coming of the Messiah. When you see and understand that Satan was trying to prevent the coming of Messiah by means of corrupting Mankind genetically, G-d's directions to Israel make sense. Some cities both man and beast had corrupted DNA that had to be removed from the gene pool. Some just animals were corrupted or just man was corrupted... and in some neither.
With the backdrop of knowing G-d was preventing Satan's plan to prevent the coming of Messiah promised to Adam and Eve, then later Abraham, Isaac and Jacob, then through the prophets, this corrupted DNA
had to be removed from the earth.
Additionally scripture can not be well understood if you take a Hellenistic approach to reading and understanding it. Hellenistic being defined as dealing with absolute facts, figures that lead to a logical progression and conclusion. Rather scripture is written in cycles, patterns, types and foreshadows that repeat from beginning to end. It is why if you want to understand the end you have to know the beginning because the end is shown in the beginning. It is an eastern way of thinking which is not Hellenistic in is approach to revealing truth. This is NOT to say that scripture does not deal in fact that lead to a logical conclusion because you indeed see this reflected in scripture but you simply can not employ a strictly Hellenistic approach to understanding scripture for when you do, you come to conclusions that scripture is contradicting itself and is therefore flawed and full of error when in fact is it not at all.