All proof of what he laid down in the former verse, by instancing in these two commands, there being the same reason of all the rest, the same sovereignty and righteousness of God appearing in them, and it being the will of God to try our obedience in one as well as another. Thou art become a transgressor of the law; viz. by contemning the authority and holiness of God, which appears in the whole law, and every command of it.
Related Commentaries of James 2:11
James 2:11
11 For he that said, Do not commit adultery, said also, Do not kill. Now if thou commit no adultery, yet if thou kill, thou art become a transgressor of the law.