This is a totally unbiblical and incorrect definition of God's wrath. His own set of proof texts refutes his conclusions.
God's wrath is the manifestation of His anger at sin. "The Lord is a jealous God and avenges; the Lord avenges and is full of wrath; the Lord takes vengeance on His adversaries, and He reserves wrath for His enemies. The Lord is slow to anger, and great in power, and will by no means clear the guilty. . . . Who can stand before His indignation? and who can abide the fierceness of His anger? His fury is poured out like fire, and the rocks are broken asunder by Him. The Lord is good, a strong hold in the day of trouble; and He knows them that put their trust in Him. But . . . He . . . will pursue His enemies into darkness." (Nahum 1:2-8).
God's wrath is as much an attribute of God as love is.
The tongues of fire on the Day of Pentecost had nothing to do with God's wrath. It was a symbol of the coming of the Holy Spirit imparting to the disciples the ability to speak in unlearned languages.
Well that's not fair, using scripture to set the truth straight...