I am against righteousness which comes from the law the law will
Never make you righteous
And no. I Am not talking about salvation although that fits also
I never claimed that righteousness "comes" from the Law, it is a Godly Standard that is to be kept forever in our view. It, the Ten Commandments, is a guide to righteous living, both towards God and man. While fallen man cannot keep it, it does not invalidate it's pure teaching.
Like all saved believers, we are dressed in Christ's Righteousness alone. Without that, we are truly lost.