If a man is hanging on for dear life to a chain, if it breaks in just one link he will still plummet to his death. Breaking even one law, one time, is enough to condemn us. See James 2:10.
“Without the atoning blood of Christ, sinners can neither have communion with a holy God, nor do any thing acceptable to him; his righteous law condemns every one who, at any time, or in any thing, transgresses it. Under its awful curse we remain as transgressors, until the redemption of Christ is applied to our hearts. Wherever the grace of God brings salvation, it teaches the believer to deny ungodliness and worldly lusts, to live soberly, righteously, and godly in this present world, consenting to, and delighting in the words of God’s law, after the inward man. In this holy walk, true peace and solid joy are to be found.” Matthew Henry
Deuteronomy 27:26 ‘Cursed is the one who does not confirm all the words of this law.’ “And all the people shall say, ‘Amen!’
Aren’t all the ‘words of the law’ it is referring to here written down in Leviticus and Deuteronomy? It’s in Deuteronomy so it can’t be referring to anything that Jesus said in the NT.
Unless you are prepared to follow all of the laws in D and L, you’ve got a theological problem here.