Another interpretation (of Genesis 11:1): "AND ONE WORDS" — that they brought forth against the two unique ones of the world. Against the Holy One, blessed be He, as it is written (in Deuteronomy 6:4): "Hear, O Israel, the LORD our God, the LORD is one." And against Abraham, as it is said (in Ezekiel 33:24): "Abraham was one {and he loved him}."
The Builders Who Spoke Against the Two Ones of the World
Midrash Tanchuma Buber, Noach 24:3
ד"א ודברים אחדים, שהוציאו אחרי שני יחידי עולם, אחרי הקב"ה דכתיב שמע ישראל ה' אלהינו ה' אחד (דברים ו ד), ואחר אברהם, שנאמר אחד היה אברהם (ואהבתו) (יחזקאל לג כד).