Is the Old Testament still in effect?

Jesus said in the New Testament

Matthew chapter 5 verse 17 the spirit through the Word of life says think not that i am come to destroy the law or the prophets i am not come to destroy but to fulfil

as you can see the only thing were not supposed to do is the burning of animals and birds Jesus was the last sacrifice now don't be fooled don't say to yourself i wouldn't have persecuted Jesus if i was there in those days were saved by the truth meaning worshipping the spirit of god he can do all things be truthful with him

Answer:

Matthew 5:17-

"Don't think I've come to abolish the Law and the Prophets. I have not come to abolish them, but to fulfill them. The truth is, until Heaven and Earth pass away, not the smallest part of a letter, will be done away with until it is all fulfilled."

And Jesus fulfilled it.

Galatians 3:25-

Now that faith has come, we are no longer under the supervision of the law.