Do you want to explain how the bible explains slavery and marrying the rapist, or even not wearing clothing of 2 different materials..... what about forbidding you from eating rabbit, shellfish, pork, weasels, scavengers, reptiles, and owls.
Please.... any of these will do?
If they are too hard, what about killing? 2 crops in the same field? No Jewelry or ostracizing people with disabilities?
Please shed some light.
Stats its not really my job to answer these questions for you nor do I have all the answers but I will answer the hardest one on your list and leave it to you to figure out the rest. Lets look at slavery. Why might the Bible/Torah have rules about how slaves should be treated rather then simply prohibit slavery outright?
Take an agrarian society surrounded by hostile nations. Go in there and forcefully abolish slavery. The result? War, bloodshed, hatred, prejudice, poverty and eventually, a return to slavery until the underlying conditions change. Which is pretty much what happened in the American South when the semi-industrialized North imposed their laws upon the agrarian South. And in Texas when Mexico attempted to abolish slavery among the Anglophones there.
Not a good idea. Better idea: Place humane restrictions upon the institution of indentured servitude. Yes, it's still ugly, but in the meantime, you'll teach people compassion and kindness. Educate. Make workshops... Eventually, things change and slavery becomes an anachronism for such a society.
Which is pretty much what happened to Jewish society. Note this: At a time when Romans had literally thousands of slaves per citizen, even the wealthiest Jews held very modest numbers of servants. And those servants, the Talmud tells us, were treated better by their masters than foreign kings would treat their own subjects.
Torah teaches us how to run a libertarian society--through education and participation. Elsewhere in the world, emperors and aristocracy knew only how to govern a mass of people through oppression. Look what happened to Rome.
Getting Real Change
If God would simply and explicitly declare all the rules, precisely as He wants His world to look and what we need to do about it, the Torah would never become real to us. No matter how much we would do and how good we would be, we would remain aliens to the process.
So, too, with slavery (and there are many other examples): In the beginning, the world starts off as a place where oppressing others is a no-qualms, perfectly acceptable practice. It's not just the practice Torah needs to deal with, it's the attitude. So Torah involves us in arriving at that attitude. To the point that we will say, "Even though the Torah lets us, we don't do things that way."
Which means that we've really learnt something. And now, we can teach it to others. Because those things you're just told, those you cannot teach. You can only teach that which you have discovered on your own.
History bears this out... As much as Rome ruled over Judea, Jewish values deeply transformed Rome. One of the results was the legal privileges eventually granted to slaves and the gradual recognition of the value of human life.
Christianity’s influence, in the west, set into motion the belief that man is accountable to God and that the law is the same regardless of status.
http://crossandquill.com/journey/the-influence-of-christianity-on-western-civilization/
Ambrose readmitted the emperor only after several months of penance and when he promoted a law, which in the case of death sentences would allow a thirty-day lag before the execution would be enforced. One can only speculate how many other massacres were avoided throughout history by the mitigating influence of a religion who's commandments include "Thou shalt not kill"
But is says to do so in the Bible.... so why do you not follow the bible?