These are great questions Pickleguy123.
First our Heavenly Father, God and Jesus are two separate spirit beings.
John 3:16 says, "For God loved the world so much that he gave his only begotten Son. . . . at John 14:28 Jesus said while here on earth, .....for the Father is greater than I am.
God gave the Israelites the Mosaic Law to (1) Uphold his holiness, keeping His worshipers free from contamination. The surrounding nations mixed worship with sex and fertility rites and God did not want that for his people.
(2) The Law served to teach the Israelites vital truths and remind them of the present reality of sin. The Law helped them to see that they need forgiveness and redemption.
(3) The Law upheld God's perfect Justice. (Deut. 19:21 "Soul will be for soul, eye for eye, . . . etc) The punishment had to fit the crime.
But the Law was loving and protected the Israelites. If a person killed a person by accident there were laws that protected that person from death. (Numbers 35:12 - 25). The law protected those that were in debt (Deuteronomy 24:10-14), protected women and children (Deuteronomy 6:6,7; Exodus 22:22-24).
But foremost the law encouraged LOVE... Leviticus 19:18 says "You must not take vengeance nor hold a grudge against the sons of your people; and you must love your fellow man as yourself. I am Jehovah."
(Leviticus 19:14, 33 & 34; Deut 22:4, 10; Deut 24:17, 18)
Please visit jw.org and type in mosaic law, jesus ransom etc. for more information.
Much of this information was taken from "Draw Close to Jehovah", Chapter 13 The Law of Jehovah is Perfect.
I think the pastors and preachers that I do listen to are reliable. The Old Testament laws being brutal was taught to me by many different sources. My family, my teachers, my friends, and the bible. We know it's true because these things are said in the bible. I have my own bible and check things with my parents and friends to make sure it is accurate. I do read proverbs a lot and it keeps reminding me that I'm not to be a fool or a stubborn cow. I don't know why you always tell me to read those, I mean-they are very straight-forward and easy to read. We know that they stoned people and that this is the law that God gave us in the Old Testament, but God is supposed to be loving right? In the New Testament, They were about to stone a woman, but Jesus stopped them, but he had no mention of the law being three witnesses. He just said that any who have not sinned-throw a stone and they stopped. The laws were very specific, why didn't Jesus who is God want them to do the laws anymore if he gave them to us in the O.T?