Atheists & Agnostics ACTUALLY READ The Bible

Satan knows every word therein.

My wife and I read it from one end to the other over a year.

I am not a Bible Scholar and do not normally quote from the Bible with the exception of a very few verses. But I Believe, There has been something that moved in my being that I cannot explain.

His arguments are valid in many cases, where did Cain get his wife? I have been told that not all of Adam and Eve's children were named in Genesis, also Cain's age when he married has not been told, I guess these items of information were not deemed exceptionally noteworthy. By the time Adam's third child, Seth was born, Adam was 130 years old and he lived to be 800. Somewhere there in time quit a number of generations of children and grandchildren may have been born.
Folks claim to be called to Preach that have no qualifications, and the argument is GOD does not call the qualified HE qualifies the Called. There are many False Teachers out there, that is between them and GOD.

To be a Christian is more than what he has described though, anyone can say they believe but if you are just parroting what someone else has told you to say you may as well be a mannequin with someone's hand up your backside. That is why Jesus said the Path to Heaven is Narrow and the Gate is small, wide is the road destruction.
If you want more information than I am able to give find a Bible teaching Church is the best advice I can give you. I praise the LORD I was lucky enough to have been lead to Believe by a very wise and studied Independent Baptist Preacher.