The smiting is not just implied in the New Testament. Jesus talked frankly about Hell. And the smiting that occurs in Revelations in the New Testament beats anything in the Old.
But I would not characterize God as “mean and vengeful” in either book. He dealt with some serious serious sins.
And the smiting that occurs in Revelations in the New Testament beats anything in the Old.
"He shall tread the winepress of the fury of the wrath of God the Almighty."
A lot of references to “The Kingdom of Heaven” and what those parables mean or meant to the Pharisees, Sadducees and scribes at that time.
Very pointed were Christ’s words.