Leviticus 5:10 And he shall offer the second for a burnt offering, according to the manner: and the priest shall make an atonement for him for his sin which he hath sinned, and it shall be forgiven him.
I am talking about personal salvation through the Law from the Decalogue and not ritual laws added by Moses as Pichuach Nephesh, the system to make the Exodus easier. HaShem never commanded laws about animal sacrifices. So, ritual laws are not God's Laws but laws of man. Read Jeremiah 7:22 to understand.
If you don't believe God forgives sin, then you must believe God is a liar.
That's not so. You are the one implying that Jesus was a liar for having sent that man who was praying for his salvation in the Temple and was reminded himself that he had offended his brother. So, Jesus told him to go to get forgiveness from he whom he had offended or no forgiveness otherwise. (Mat. 5:23,24)
Jesus, God's only begotten Son, died on the cross to shed the blood of the new covenant for the forgiveness of our sins. Matthew 26:28 For this is my blood of the new testament, which is shed for many for the remission of sins.
Not true. That was not the reason for the sheding of his blood but because his disciples were acclaiming him king of the Jews in Jerusalem. (Luke 19:37-40)
This is the same new covenant prophesied through Jeremiah.Jeremiah 31:31-34. Behold, the days come, saith the Lord, that I will make a new covenant with the house of Israel, and with the house of Judah:32 Not according to the covenant that I made with their fathers in the day that I took them by the hand to bring them out of the land of Egypt; which my covenant they brake, although I was an husband unto them, saith the Lord: 33 But this shall be the covenant that I will make with the house of Israel; After those days, saith the Lord, I will put my law in their inward parts, and write it in their hearts; and will be their God, and they shall be my people. 34 And they shall teach no more every man his neighbour, and every man his brother, saying, Know the Lord: for they shall all know me, from the least of them unto the greatest of them, saith the Lord: for I will forgive their iniquity, and I will remember their sin no more.
As I can see, you really do not like the Prophets of the Most High. Now, you are going against the Lord Himself because He said to Jeremiah that the New Covenant was made with the House of Israel and the House of Judah. There is no mention of Gentiles here. Now, the quote for you to read is Deuteronomy 4:2.