Seems like this is the active topic, so I should write here instead.
Many people dismiss the Bible as a mere fairy tale. It may be true, it may be not. Also, many people seem to loathe the Old Testament for the following things:
-Punishing homoloveuality
-Punishing adultery
-Rape can be made "right" if the rapist marries the victim
-Unruly children can be killed freely
-Many other things that are shocking to the people of the 21st century
First of all, you are taking it out of context. The Old Testament was written a long time ago, you can't approach it with modern mindset/perception. Some parts can be considered as a legal document, so it should be treated that way, because the intention was to set and enforce the people's roles in the society. It was necessary to do so in those times, their survival depended on it. And this is why these previously mentioned rules were created and enforced.
Back then resources were scarce, however, the whole society was simple, yet it wasn't that efficient at redistributing riches among people. Your survival was dependent on many things, among these was having a child. Now, from homoloveual relationships you don't have children, normally. Children were the key to survival of a certain group (family, clan, tribe). If you got old, you had your children to take care of you. (Your sons, mostly. The daughters were sent to other families, so nubile girls never stayed in the family they were born into for too long). Basically, homoloveuals contributed nothing to the survival of the group as they were unable to reproduce, they were a burden on the group when they got old.
Adultery may not seem to be a sin for you now, but punishing adultery, especially women, had its own reasons. Women had the role of taking care and raising children. Basically, adultery could have meant two things:
-Woman may get detached from the husband and leave the family. It is unwanted, as it is rather destructive to the family, which is a key element in society.
-Woman may get pregnant and have a baby from the partner. It would be somewhat like cuckoo, you have your child raised by someone else. And back in the days, when you had to work hard to produce the goods you probably did not want to waste your resources on a child that is not your blood, therefore not your supposed continuation.
Marriage after rape was justified as to make it "holy". It is just some fancy reasoning for one rather obvious thing: rape usually resulted in impregnation. Back in the day, they had no idea about safe love, so many bodily fluids were involved, like semen. Marrying the victim was for creating a family where the child could be raised in, as the victim hardly had any chance raising the child all alone, a father was needed back then (just like now).
The part about the unruly child, which you may hate the most, is not something that was in the Old Testament alone. It was present in all the primitive societies. Romans had it too (it was limited by the end), where the paterfamilias had "vitaeque ac necis" meaning that he had full control over his son, he could actually kill him for no reason at all. Because the duty of the sons was to work for the benefit of the family. The family was represented by the father, and by denying him the son basically denied the whole family that he was supposed to work for; therefore he was a burden.
I could be trying to take many examples, but I hope this made it clear why you shouldn't approach it with modern mindset. It was a legal document, meaning it was for regulating and keeping up the circumstances that they were living in. When the epistles said that every title and every word was true from the Old Testament, they were actually right, because their living conditions were only slightly better than the living condition of the authors.
Applying these on the modern society with modern welfare and other complex systems would be like trying to put on a toddler's clothes: it does not fit.
That was a bit off-topic. To be on the topic, if we could prove God scientifically, that would mean that he's no longer God. I don't believe in the church, but there must be something out there.
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