It's not about what God is big enough to do, it's about what God actually does. The problem that you have is that you dismiss human logic when consider God altogether. You admit that it makes sense for things to be fixed in the mind of God but then you will say, "that's your finite human mind trying to understand God, you can't do that, etc." That's utter nonsense, it's a cop out, and it's poor biblical interpretation.
In Exodus 32 God tells Moses, "Now therefore let me alone, that my wrath may wax hot against them, and that I may consume them: and I will make of thee a great nation." First of all, the part where God says He would make of Moses a great nation is logically dependent on God consuming Israel. The order is this: let me alone that (in order so) my wrath may wax hot against them, and (next part) I may consume them and (final part) I will make of theee a great nation. He won't make of Moses a great nation unless He consumes Israel.
All of this goes right back to the first part of that text, "let me alone." Moses, however, did not let God alone. Moses made a great intercessory prayer for Israel.
In Exodus 32 God tells Moses, "Now therefore let me alone, that my wrath may wax hot against them, and that I may consume them: and I will make of thee a great nation." First of all, the part where God says He would make of Moses a great nation is logically dependent on God consuming Israel. The order is this: let me alone that (in order so) my wrath may wax hot against them, and (next part) I may consume them and (final part) I will make of theee a great nation. He won't make of Moses a great nation unless He consumes Israel.
All of this goes right back to the first part of that text, "let me alone." Moses, however, did not let God alone. Moses made a great intercessory prayer for Israel.