If you deny the OT God then you deny the NT God that was revealed to you.
If the idea of the God of the OT was the same as Christ, then the Jews would have recognized Him as God. Instead, they expected, even demanded an OT despot God.
The OT righteous DID recognize Christ as God in the coming. Some Jews in Christ's time also recognized Him, as the Father revealed to them:
Matt 16:15-17 : 15 "But what about you?" he asked. "Who do you say I am?" 16 Simon Peter answered, "You are the Christ, the Son of the living God." 17 Jesus replied, "Blessed are you, Simon son of Jonah, for this was not revealed to you by man, but by my Father in heaven.
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To the Jews, a sovereign God would not allow Himself to be humiliated and tortured and killed like a common thief. They expected, indeed demanded, that He react just as the God of your OT verses portray Him—by smiting His enemies and driving the fear of God (no pun intended) in their hearts.
YES, for many Jews this was true, but NOT ALL Jews. Jesus obviously exposed all the Jews who thought as you described as not being righteous. The righteous Jews were not so misguided. As quoted above, the Father revealed to those He would, as He would.
Well, the Gospels and the OT are like night and day. God doesn't change from a tyrant humble servant; God doesn't change from a hater to a lover. That would be way too human even for God!
The OT righteous DID recognize Christ as God in the coming
And what was God doing for 1700 or so years by hiding His real identity from the vast majority of the Jews? Playing games with them? If God would desire all men to be saved then why would He keep all these people for centuries in darkness? Because He so loves the world?
The OT righteous DID recognize Christ as God in the coming
Oh yeah? By attributing to God all the death and destruction? That seems to be the characteristic of three groups so far: the OT Jews, fundamentalist Christians and Muslims. Whatever they do, they did/do because supposedly God "orders" them to do these things! So, when the Islamic thugs bomb an Israeli pizza parlor they are doing "God's work..."
In other words, it's either an excuse or insanity in their heads. It's not the God of the Gospels, not the Christian God, for sure.
The righteous Jews were not so misguided
And WHO misguided them according to your theology? Is it not God? Is it not God who predestined them from before foundations of the world to be misguided?