They are for it because the law (torah) is still in play.
Jesus said, "Do not think that I came to destroy the Law or the Prophets. I did not come to destroy but to fulfill. For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law, till all be fulfilled."
Responding with a response to another person:
Jesus said, "Do not think that I came to destroy the Law or the Prophets. I did not come to destroy but to fulfill. For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law, till all be fulfilled."
By fulfilling the law he destroys it, but the law and prophets are still in place because the law is removed after heaven and earth pass.
Basically, follow me, but follow the law.
This is one contradiction that makes people confused and follow blindly without thinking for themselves
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