All Herod had to do was to confess that the head of John the Baptist was worth more than half of his kingdom.
Failing to rightly evaluate John and John's ministry, Herod, though desiring to see Jesus (Luke 9:9) never even saw him, much less was invited to follow him, after the rejection of John. A very important lesson to be learned.
The three 'Herods' in scripture are not further identified : they are treated as a single entity with one - communal - character, much as the Pharisees are treated in scripture : a class of person characterised by behaviour, without integrity of individuality.
This Herod behaves with no discernible repentance, though he heard John's words. He was moved by political and social motives, not spiritual desires. Rather than receive rebuke, he incarcerates. Rather than be righteous, he murders.
He is a slave to the opinion of others, (his 'wife' and the onlookers) without an integrity of his own.
None of the Herods lasted long after they murdered : the blood of the murdered children, the blood of John the Baptist and the blood of James, brother of John cried out from the ground, and judgment soon fell upon each Herod in turn.
These are the motivations of Herod. Whatever his thoughts and feelings were about festivities, it matters little.
What matters is his rejection of John's ministry (a baptism of repentance) and; his rebuttal of righteous rebuke ; and his murderous behaviour.
And, of course, his unlawful 'marriage' which was actually adultery.