I think Pat Robertson is a staunch supporter of Jesus Christ, and he doesn't care who he offends when he is speaking the Word.
"seem to see Jesus' ministry as a vengeful one,"
2 Thessalonians 1:7-9:
The Lord Jesus [will be] revealed from heaven with his mighty angels 8 in flaming fire, inflicting vengeance on those who do not know God and on those who do not obey the gospel of our Lord Jesus. 9 They will suffer the punishment of eternal destruction, away from the presence of the Lord and from the glory of his might.
God is vengeful. God=Jesus, therefore Jesus vengeful.