Therefore, why keep the Bible and worship Moses and his idol Jehovah?!...
You don't have to directly worship YHWH, the God of Avraham, Yitzhak, and Yakov, to read, enjoy, and find wisdom in the Tanakh, and you don't have to believe Jesus to be the Messiah to follow his teachings, WHICH, by the way, are nearly perfectly paralleled in Hinduism and Confucianism. (Especially the latter.)
Besides, if nothing else, we keep it as a part of history and culture. Like it or not, modern Western culture, even the parts that are not religious, were born from this book.
Following your point, I agree that "thou shalt not kill/murder/slaughter/maim/assassinate/snuff out/shoot/gun down/ massacre/slay/hang" is a commandment NEVER obeyed in the history of Israel.
That long list of nonsense is not what the commandment said. It's pretty clear you're not even reading posts, and it's also very obvious that you never read the Biblical canon. I tell you the truth: until you read it for real (and that means STUDY), you will be forever ill-equipped to successfully debate its issues, as I once was until a member here directed me to some great material.