Nimrod means "let us revolt." In the context of Genesis 10, there is absolutely no mention of animals that he supposedly hunted. The context has to do with the description of character, moral spirituality, and culture. Nimrod was a mighty man, a mighty hunter in terms of men. He was like the Nephilim (see Genesis 6:4). He was a giant of a moral and spiritual nature.
What was Nimrod doing when he was hunting? Nimrod hunted other Nephilim and eliminated them. He got rid of the competition and established a despotic and autocratic system of government. He did that before the Lord. In other words, he did what he did right in front of God. God was aware of what he was doing. The revolt was not hidden.
If a person is standing before another, he can stand before him as a friend, as neutral, or as an enemy. There is already an indication of how Nimrod stood before the Lord, because he is named "he who revolts." He is standing before the Lord as an enemy. He is against God, as chapter 11 shows.
Nimrod founded a city, and he named it Babilu. Not Babel. He called it Babilu, which means "Gate of God." "Babel" is what the Hebrews called it, and thus when Moses, a Hebrew, wrote Genesis, he called it "Babel." Babel is the Hebrew name. It sounds somewhat similar to Babilu, but Babel means "confusion."
John W. Ritenbaugh
Where Is the Beast? (Part 2)