On one level it is very simple: God will send to hell every person who rejects His Son. When Jesus said He was the only way to get to heaven, He meant it:
"Jesus said to him, 'I am the way, the truth, and the life. No one comes to the Father except through me.'" John 14:6
However, that refers to individuals. Every single human since then is bound by it. Each person must choose or reject Christ. God did not condemn all Jews or the nation of Israel as a whole.
Even when they were punished by allowing Babylon to conquer them and send them into exile, God promised a restoration after 70 years and even prophecies in advance that Cyrus of Persia would do that. And again, when God decreed the destruction of the temple and Jerusalem (the Romans did that in AD 70) He also prophesied the restoration which took place in 1947 with the establishment of the modern state of Israel.
Throughout history, God's blessings and curses have been applied to nations based upon their treatment of His chosen people (Jews & Christians): Romans, Ottomans, British, and the US are some examples.
“Incline my heart to your testimonies, and not to selfish gain!”
Psalm 119:36