You are loved

Yes, the Old Testament has lots of violence, but not everything which was recorded was condoned by God. The Bible contains many stories where society abandoned God and went wrong, particularly in terms of murder, adultery, rape, polygamy, child sacrifice, incest, etc. (Genesis 29-30, 34; Judges 13-21; 1 Samuel 1:1-8; 2 Samuel 11-13; 2 Chronicles 33:6).
God used the law also to protect groups of people who did not have any protection in other societies of that time. The Law offered protection for slaves (Exodus 21:20, 26-27; Deuteronomy 15:12, 23:15-16) and protection and inheritance rights for women - which was a huge deal in a patriarchal society (Exodus 21:7-11; Numbers 27:1-11; Deuteronomy 22:25-26).
God rescued the Israelites from over 400 years of oppression and slavery in Egypt, where they were being abused and murdered by their slave masters (Exodus 1:11-14, 22, 12:31-42) and God rewarded the midwives who did not submit to Pharaoh's order to murder baby Hebrew boys (Exodus 1:15-21)
Yes - God cannot tolerate sin, because sin causes suffering and death. After we were tricked into experience this. He did not give up on us, but He wanted to redeem us from the beginning. His Old Testament Name got depicted as Yod Hey Vav Hey - according to the ancient Hebrew pictograms: the hand - look - the nail - look. Check it out yourself: http://www.hebrew4christians.com/Grammar/Unit_One/Pictograms/pictograms.html
Jesus Christ ~ Passion of Christ and Resurrection of Jesus proven by a WORM: https://www.youtube.com/watch?v=qYKM1Z9QEJ4