Anytime someone is quoting a source to someone else, they frequently change the pronouns to nouns to make it understandable.
from the Harper Collins Study Bible, new revised standard version:
Genesis 12.3: "I will bless those who bless you, and the one who curses you I will curse," referring to the "great nation" derived from the family of Abram, i.e., the Jewish people, it would seem to me.
What Professor Adams said was accurate. It wasn't a direct quote, but it was accurate.
He is very careful with his facts. You can see for yourself--read his columns at:
http://www.townhall.com/columnists