And we read, Mark iii.

5, that, in the synagogue at Capernaum, the Lord Jesus looked round on the hard-hearted Pharisees with anger; and in Him was no sin.
Nehemiah was very angry, yet Nehemiah sinned not in being so, for it was anger at sin, anger at the wrongdoing which was bringing disgrace on his nation, anger at the conduct which was offending God and doing harm to God's cause.

It was righteous anger against the cruelty and selfishness of those who, in those hard times, had profited from the poverty and distress of their poor fellow countrymen.
For some time Nehemiah did nothing, but he carefully turned the matter over in his mind.

He says, 'I consulted with myself,' or as it is in the margin, 'My heart consulted in me.' We can picture him pacing up and down, saying again and again, What shall I do?
What is the wisest course to take?
How can this great evil be stopped?
Doubtless, too, he took this trouble, as he had taken all his other anxieties and cares, and laid it before the God of heaven.
Then he sends for the nobles and all those who had oppressed the people, and he gives them very plainly his mind on the matter: 'I rebuked the nobles, and the rulers, and said unto them, Ye exact usury, every one of his brother.' And thereby they had broken the law, for no Jew was allowed to take interest, or increase, of another Jew, much less to exact usury: see Exod.xxii.

25; Ezek.xviii.8, 17.
The Hebrew was to look upon every other Hebrew as his brother, and to treat him as such.