(Genocide) Benjaminites: Judges 20:48

The Israelites turned back against the rest of the Benjaminites and killed them all---men, women, and children, and animals as well. They burned every town in the area.-Judges 20:48

(Genocide) Jerusalem: Ezekiel 9:4-10

And the LORD said to him, "Go through the city, through Jerusalem, and put a mark upon the foreheads of the men who sigh and groan over all the abominations that are committed in it." And to the others he said in my hearing, "Pass through the city after him, and smite; your eye shall not spare, and you shall show no pity; slay old men outright, young men and maidens, little children and women, but touch no one upon whom is the mark. And begin at my sanctuary." So they began with the elders who were before the house. Then he said to them, "Defile the house, and fill the courts with the slain. Go forth." So they went forth, and smote in the city. And while they were smiting, and I was left alone, I fell upon my face, and cried, "Ah Lord GOD! wilt thou destroy all that remains of Israel in the outpouring of thy wrath upon Jerusalem?" Then he said to me, "The guilt of the house of Israel and Judah is exceedingly great; the land is full of blood, and the city full of injustice; for they say, 'The LORD has forsaken the land, and the LORD does not see.' As for me, my eye will not spare, nor will I have pity, but I will requite their deeds upon their heads." -Ezekiel 9:4-10

(Genocide) Nonbelievers: Deuteronomy 13:13-17

that some worthless people of your nation have misled the people of their town to worship gods that you have never worshiped before. If you hear such a rumor, investigate it thoroughly; and if it is true that this evil thing did happen, then kill all the people in that town and all their livestock too. Destroy that town completely. Bring together all the possessions of the people who live there and pile them up in the town square. Then burn the town and everything in it as an offering to the LORD your God. It must be left in ruins forever and never again be rebuilt. Do not keep for yourselves anything that was condemned to destruction, and then the LORD will turn from his fierce anger and show you mercy. He will be merciful to you and make you a numerous people, as he promised your ancestors, -Deuteronomy 13:13-17

(Genocide) Amalekites: 1 Samuel 15:1-9 GNB

Samuel said to Saul, "I am the one whom the Lord sent to anoint you king of his people Israel. Now listen to what the Lord Almighty says. He is going to punish the people of Amalek because their ancestors opposed the Israelites when they were coming from Egypt. Go and attack the Amaleks and compelety destroy everything they have. Don't leave a thing; kill all the men, women, children and babies; the cattle, sheep, camels, and donkeys."

Saul called his forces together and inspected them at Telem: there were 200,000 soldiers from Israel and 10,000 from Judah. Then he and his men went to the city of Amalek and waited in ambush in a dry riverbed. He sent a warning to the Kenites, a people whose ancestors had been kind to the Israelites when they came from Egypt: "Go away and leave the Amalekites, so that I won't kill you along with them." So the Kenites left.

Saul defeated the Amalekites, fighting all the way from Havilah to Shur, east of Egypt; he captured King Agag of Amalek alive and killed all the people. But Saul and his men spared Agag's life and did not kill the best sheep and cattle, the best calves and lambs, or anything else that was good; they destroyed only what was useless or worthless. -1 Samuel 15:1-9 GNB

(Cruel God) Destroyer of Nations: Zephaniah 3:6-10 NLT

"I have wiped out many nations, devastating their fortress walls and towers. Their cities are now deserted; their streets are in silent ruin. There are no survivors to even tell what happened. I thought, 'Surely they will have reverence for me now! Surely they will listen to my warnings, so I won't need to strike again.' But no; however much I punish them, they continue their evil practices from dawn till dusk and dusk till dawn." So now the LORD says: "Be patient; the time is coming soon when I will stand up and accuse these evil nations. For it is my decision to gather together the kingdoms of the earth and pour out my fiercest anger and fury on them. All the earth will be devoured by the fire of my jealousy. "On that day I will purify the lips of all people, so that everyone will be able to worship the LORD together. My scattered people who live beyond the rivers of Ethiopia will come to present their offerings. -Zephaniah 3:6-10 NLT

(Cruel God) Destroy Everything: Zephaniah 1:2-6 GNB

The LORD said, "I am going to destroy everything on earth, all human beings and animals, birds and fish. I will bring about the downfall of the wicked. I will destroy everyone, and no survivors will be left. I, the LORD, have spoken. "I will punish the people of Jerusalem and of all Judah. I will destroy the last trace of the worship of Baal there, and no one will even remember the pagan priests who serve him. I will destroy anyone who goes up on the roof and worships the sun, the moon, and the stars. I will also destroy those who worship me and swear loyalty to me, but then take oaths in the name of the god Molech. I will destroy those who have turned back and no longer follow me, those who do not come to me or ask me to guide them." Zephaniah 1:2-6 GNB

(Cruel God) Killer Angel: 2 Kings 19:35 GNB

That night an angel of the LORD went to the Assyrian camp and killed 185,000 soldiers. At dawn the next day there they lay, all dead! -2 Kings 19:35 GNB