He is an angry ex-priest who despises all religion, especially the one in which he was raised.
I'll point out, of course, that Carroll is misusing the word "terrible" in an embarassingly amateurish way.
The Hebrew word in Ex 34:10 which is translated by the KJV as "terrible" is nora' - which really means "awe-provoking."
For example, the Jewish holiday season between Rosh Hashanah and Yom Kippur are called the Yamim Nora'im - commonly translated as "The Days of Awe", not "The Days of Terribleness."
God is telling Moses that he is doing something unfathomable - intervening in history to benefit the people of Israel by giving them their land.
Exactly. Carroll misrepresents the meaning of "terrible" in the Biblical context. Typical leftist corruption of the language to suit his agenda.
What lefty can resist the urge to bash both America and (indirectly) Israel in the same article?