Who plotted to have the entire Hebrew nation completely exterminated?

A:I know of no biblical account that reports anyone plotting to destroy the entire Hebrew nation, or even all the people of Judah.

However, the Book of Esther, which Leonard J. Greenspoon (The Oxford History of the Biblical World, Between Alexandria and Antioch) describes as a second-century Jewish novel, says that the wicked Haman sought to have all the Jews living in Persia killed.