"When Israel danced about the golden calf, God said to Moses,
Exodus 32:10
...let Me alone, that My wrath may wax hot against them, and that I may consume them.
Moses attempted to pacify God and said, 
11
...Lord, why does Your wrath wax hot against Your people?
12
...Turn from Your fierce wrath, and repent of this evil against Your people.
14
And the Lord repented of the evil which He thought to do unto His people.
We readily see that in this interesting episode God was merely testing Abraham, and giving him an opportunity to plead for the people.
But we also note that this illustrates God’s willingness to talk over matters with His saints; yes, and with those who are not saints.
His invitation to mankind is,
Isaiah 1:18
Come now, and let us reason together.
God is anxious to communicate with His people.
Neither Abraham nor Moses was rebuked for his boldness."
M.L. Andreasen