According to the author of 2 Kings, a man named Ishmael, who was part of the royal family, came with ten men and killed Gedaliah, along with some Jews and people from Babylon, at a place called Mizpah. This event shows how there was trouble and fighting among the people during that time.
2 Kings 25:25: But it came to pass in the seventh month, that Ishmael the son of Nethaniah, the son of Elishama, of the seed royal, came, and ten men with him, and smote Gedaliah, that he died, and the Jews and the Chaldees that were with him at Mizpah. [royal: Heb. of the kingdom]
Explains that when a man's ways please the Lord, He makes even his enemies to be at peace with him, contradicting the violent action in 2 Kings 25:25.
Proverbs 16:7: When a man's ways please the LORD, he maketh even his enemies to be at peace with him.