" . . . Cause the Holy One of Israel to cease from before us."
Wicked people would love to have God be dead. Actually, all of us, in our fallen natures, would be very happy if there *was no* God, so that we could sin with impunity (and without conscience issues). But alas, for all God-haters, the Lord does indeed exist.
Not only does the Sovereign God exist--but He will also execute wrath and punishment on *all* sin. For the regenerate, this has already been done, as the Father unleashed His righteous judgment of our sins on His Own Son, Jesus Christ. For the unbelieving, however, they will have to suffer their own punishment forever, in hell.
[Puritan quote of the day: "David committed many sins, but especially those two of adultery and murder, and yet God pardoned Him. But Saul committed far less sins than those and yet God cast him off forever." --Jeremiah Burroughs, in "Gospel Remission"]