this is an interesting little thread you have here, my dear spawn. everything from Biblical criticism to early american history to the abilities of superheroes.
back to da ark:
1. the argument about incest is specious really. the account never says that Noah had any more children, but if he did, wouldn't they be with his own wife? he was a righteous man. Noah's children's children would have married their cousins most likely. and being so close to human perfection, they would have not had the defective genes that modern humans carry.
as for Noah getting inebriated, wouldn't the end of the world make you a little nervous too?
2. why did God flood the earth? one reason was of course to rid it of the wicked people who lived there. another was to cause the end of the violent hybrid children of fallen angels (Gen 6:1-4) and to make those demonic angels go back to a spirit form indefinitely. it was then that they were condemned to dense darkness. (2Pet 2:4)
3. where are the dead that God destroyed? since they were condemned by God Himself, they will not be resurrected. they are not in a burning Hell, nor are any of them in heaven.
we are warned that our own actions affect our families. God's character is such that He would never put to death the innocent with the guilty. (He
can see into the future if He wishes.) perhaps one of the reasons it took many years to complete the ark was that He wanted any deserving ones to die a natural death before the flood occurred.
all those God destroys deserve it. (Jer 17:10)
God, who can create or destroy entire galaxies with no effort at all, has to get some poor slob to build an enormous ship, transport millions of animals from all over the planet to this ship, flood the entire planet, drain the water and then redistribute the animals again. What is the point? Why not just click his fingers and cause everything to be as he wishes it to be?
this is a particularly interesting question because it in embodies the entire theme of the Bible. to answer it, one must go back farther than the episode with Noah, back to the creation of man.
God created perfect humans who had not only perfect bodies, but perfect minds. the earth and all that was in it, He gave to them with His blessing. the only thing He held back was His sovereignty over them - His right to decide for them what is right conduct and what is wrong conduct. that was what the test of the tree of "good and evil" was about.
Adam and Eve had free will and knew perfectly well what the consequences of disobedience were. (God wanted their love and willing obedience and as their Creator He deserved it. He does not want robots.)
so what does this have to do with why God didn't just destroy A&E when they sinned and just start again?
killing A&E would not prove that God is the correct one to decide what is good or bad for the human race. it would only prove that He has the power to destroy it.
who would know it, you say? if He destroyed everyone, no one would know any different, right?
wrong. the angels would know. they have free will too. (some have been persuaded by satan to leave heaven anyway.) how could they love someone who, if you disobeyed, POW!, you're gone, even if you had an honest question.
satan's questions to eve (Gen 3:1-5) brought into question the right of God to rule humans.
the questions also implied that God was holding something beneficial back from us. what was that "beneficial" thing? - "being like God, knowing good and bad".
but how could God prove it was beneficial for humans to follow His commands?
He had to let a lot of time pass where humans could try many types of governments to see if they could bring happiness to all of mankind. this humans have failed to do.
from time to time, God has involved Himself in the world of mankind to bring about the reconciliation of people to Himself or to further His purposes.
perhaps the world of Noah's day was so violent (Gen 6:11) that God was protecting those who were righteous from destruction. Noah preached about the coming of the flood for many years (2Pet2:5) before it came and still only 8 persons survived.
at some point, however, God will step into the world's affairs again to finish His purpose for the earth - to fill it with perfect, peaceful, loving humans. those who will not love their neighbors as themselves will be once again destroyed. (Ps 37:10,11)
it is then that the meek will truly inherit the earth that our first parents lost.