Trofimus I think, was the one that mentioned this earlier. I like the explanation given here at GOT QUESTIONS:
How then do we explain verses that seem to say that God
does change His mind? Verses such as
Genesis 6:6, “The LORD was grieved that He had made man on the earth, and His heart was filled with pain.” Also,
Exodus 32:14 proclaims, “Then the LORD relented and did not bring on His people the disaster He had threatened.” These verses speak of the Lord “repenting” or “relenting” of something and seem to contradict the doctrine of God’s immutability.
Another passage that is often used to show that God changes His mind is the story of
Jonah. Through His prophet, God had told Nineveh He would destroy the city in forty days (
Jonah 3:4). However, Nineveh repented of their sin (verses 5–9). In response to the Assyrians’ repentance, God relented: “He had compassion and did not bring upon them the destruction He had threatened” (verse 10).
There are two important considerations involving the passages that say God changed His mind. First, we can say statements such as “the LORD was grieved that He had made man on the earth” (
Genesis 6:6) are examples of anthropopathism (or anthropopatheia). Anthropopathism is a figure of speech in which the feelings or thought processes of finite humanity are ascribed to the infinite God. It’s a way to help us understand God’s work from a human perspective. In
Genesis 6:6 specifically, we understand God’s sorrow over man’s sin. God obviously did not reverse His decision to create man. The fact that we are alive today is proof that God did not “change His mind” about the creation.
The article goes on, but you get the point. God does NOT change His Mind. I can't even believe people think that!