For example a Pharisee might not physically kill (however they did Jesus) but they still break the commandment to not murder as they were angry with Christ and his followers without a reason. They called gentiles useless and good for nothing.
as it is written:
Mat 5:21 Ye have heard that it was said by them of old time, Thou shalt not kill; and whosoever shall kill shall be in danger of the judgment:
Mat 5:22 But I say unto you, That whosoever is angry with his brother without a cause shall be in danger of the judgment: and whosoever shall say to his brother, Raca, shall be in danger of the council: but whosoever shall
Now this is not new teaching the law always taught these things but they had reduced it to the simplicity of Though shalt not murder, without seeing the deeper meaning that they should have seen in the law.
as it is written:
Psa 119:96 I have seen an end of all perfection: but thy commandment is exceeding broad.
So it is today, it is hard to see fruit if we only look on the surface. but when we look deeper into the law the curtain is pulled back and the inner life is revealed. not always straight away but in time sin if it is there will show.
This is why Jesus said:
Mat 7:15 Beware of false prophets, which come to you in sheep's clothing, but inwardly they are ravening wolves.
Mat 7:16 Ye shall know them by their fruits. Do men gather grapes of thorns, or figs of thistles?
Mat 7:17 Even so every good tree bringeth forth good fruit; but a corrupt tree bringeth forth evil fruit.
Mat 7:18 A good tree cannot bring forth evil fruit, neither can a corrupt tree bring forth good fruit.
Mat 7:19 Every tree that bringeth not forth good fruit is hewn down, and cast into the fire.
Mat 7:20 Wherefore by their fruits ye shall know them.
The fruit will show, So by the narrow reading of the law the Pharisees seemed righteous, but to those who see the broadness of the law the fruit will manifest openly.