James 2:10 For whosoever shall keep the whole law, and yet offend in one point, he is guilty of all.
It does not say if you keep one, you have kept them all. To the contrary, that is why there were different sacrifices for different offenses.
God's view of His chosen people differs from yours.
He has called them disobedient, wicked, whiners, always insisting on a sign. He tells them not to take spoils, they take spoils. He tells them not to let Haman's ancestor live and the Jews were nearly wiped out because they disobeyed. He started dropping them like flies when they decided to kill Moses. Moses left them to meet God on the mountain top, and they reverted to idol worship the minute he was gone. They literally ask God to leave His own Temple. They missed the hour of their visitation, and were instrumental in the crucifixion of Christ. They have scales on their eyes at present, and will make a deal with the devil which gives away Jewish land. And because of it, 1/3 of them will perish, and then 1/3 of the 1/3 that is left will also perish.
As hard as they work at trying to obey the Law, they still break it.
Do you think they were any more pious than Billy Graham, or you for example? Their works are filthy rags to God. Your praise in Jesus' name makes God dance over you. There is no work that trumps your faith, Meriweather...