A lot of christians try to discredit the OT because jesus wasn't in it but changing the OT was not his goal. Never did the alleged jesus say that the old testament is abolished. A lot of christians just cherry pick the things that sound nice and ignore things like Exodus 31:14-15
No. Levitical law was, in large part, changed or 'fulfilled' when Christ died for us. It was his purpose in coming. To take the weight of our sins so we no longer have to observe strict ritual and regulation and sacrifice in order to be close to God. All we have to do now is ask. Any Mosaic law still relevant is repeated in the New Testament, including the Ten Commandments. Most food and clothing laws as well as sacrifices and ceremonial laws were abolished or not repeated for gentile worshipers.
The laws of the Jews were for the Jews. Christians (and even today, many Jews) take the levitical laws and find spiritual principles behind it, and make application of the principle. But the Jews committed themselves and their children to the laws at Sinai. Christians have made no such commitment, and even the early church laid no burden on Gentiles other than the rules found in Acts 15 (c. 49 AD): "We write to them to abstain from things polluted by idols, from sexual immorality, from things strangled, and from blood? (Acts 15:20; also 15:29; 21:25). Evidently the Noahide laws are those in view; Jews consider these laws to be universal as they were given to mankind before Noah.
The Old Testament Law is comprised of those guidelines and statutes given by God to Moses on Mt. Sinai. The Law can be sorted into three main categories. The moral law, such as rules against adultery and theft, define the behavior and actions God requires. The civil law, like restrictions against weaving two materials into one fabric or breeding mules, was designed to set apart God's chosen people from the environment around them. The ceremonial law, including all the regulations on sacrifices, explained what the Israelites needed to do to maintain their spiritual relationship with God. However, the Old Testament Law does provide guidelines for living the Christian life. The "moral"laws given to the Israelites describe practical ways to love God and others. http://www.compellingtruth.org/Christian-OT-Law.html