I personally have never had much use for the Old Testament. The Jews, it seemed, worshipped Satan, not God. Because the God of the OT is so much different than the God of the NT. He was jealous, angry, vindictive, sadistic, murderous. He was Satan. Then Jesus came and told the Jews and everyone else what was really up, and what God was really like. He said, “You are of your father the devil.” Proves it. The OT predicts Christ’s salvation, but don’t ever believe what it says about God, because it’s a lie.
Well actually God has always existed, He is merciful and just, and the pagan concept of Satan as a contrary and uncontrollable force to God, does not exist in Judaism or in the Jewish scriptures.
However as you are only interested in Christian scriptures perhaps the following passages (frequently used to support centuries of European anti-Semitism and violence against Jews) may be pertinent:
“Take my enemies, who would not have me rule over them, bring them here, and kill them before me.” (Luke 19:27).
“He who does not abide in me is thrown away like a withered branch. Such withered branches are gathered together, cast into the fire and burned.” (John 15:6)
“…and he who has no sword, let him sell his garment and buy one.” (Luke 23:36)
“Think not that I have come to send peace to the world. I come not to send peace, but the sword.” (Matthew 10:34)
“If anyone comes to me and does not hate his father and mother, wife and children, brothers and sisters, yes, and his own life also, he cannot be my disciple.” (Luke 14:26)
“For judgment I have come into this world, that those that do not see may see, and that those who see may be made blind.” (John 9:39)
“He who believes in the son has everlasting life. But he who does not believe in the son shall not see life, but shall suffer the everlasting wrath of God.” (John 3:36)
In contrast, the God of the Jewish scriptures, the one and only everlasting God, is the God of all, all are equal and precious in His eyes. The world to come is open to all, Jew and Gentile (in fact it is easier for the Gentile than for the Jew to get to the world to come as they are exempt from the commandments dealing with holiness-such as keeping kosher). Gentiles, be they Christian or Moslem or Hindu or whatever, are judged by God by their ethical behaviour (the seven categories of the Noahide commandments). In the book of Yonah (Jonah) it is a Gentile city that repents and which is spared by God.