They were, are, or will forever be drunk with blood.
The phrase “drunk with blood” (or variants of it) is used five times in the Bible. Let's take a look at them.
First of all, God used it to describe himself: his arrows are drunk with blood.
I will make mine arrows drunk with blood, and my sword shall devour flesh. Deuteronomy 32:42
His sword is drunk with blood, too, just like his arrows.
This is the day of the Lord GOD of hosts, a day of vengeance, that he may avenge him of his adversaries: and the sword shall devour, and it shall be satiate and made drunk with their blood. Jeremiah 46:10
And God will force people (before he kills them) to eat their own flesh and get drunk on their own blood.
I will feed them that oppress thee with their own flesh; and they shall be drunken with their own blood, as with sweet wine. Isaiah 49:26
Then God will feed his victims’ bodies to the birds and beasts until they too become drunk with blood.
Thus saith the Lord GOD; Speak unto every feathered fowl, and to every beast of the field, Assemble yourselves, and come; gather yourselves on every side to my sacrifice that I do sacrifice for you … that ye may eat flesh, and drink blood. … And ye shall eat fat till ye be full, and drink blood till ye be drunken, of my sacrifice which I have sacrificed for you. Ezekiel 39.17-19
And finally, the Great Whore of Babylon will be drunk with the blood of the saints and martyrs.
And upon her forehead was a name written, MYSTERY, BABYLON THE GREAT, THE MOTHER OF HARLOTS AND ABOMINATIONS OF THE EARTH. And I saw the woman drunken with the blood of the saints, and with the blood of the martyrs of Jesus: and when I saw her, I wondered with great admiration. Revelation 17.5-6
So in the end, pretty much everyone will be drunk with blood: God, the people that he kills, the birds and beasts that eat their dead bodies, and the Great Whore of Babylon. It will be just one big, bloody, drunken party. I bet you can’t wait to be there!