Because we fell away from God just like Israel did. Now, here come the Phillistenes.

The difference is, God saved Israel then, will he save the USA, I doubt it. Why should he? He's Gracious and Compassionate, but we spurned his son, he's slow to anger, and this country's done heaps of evil, he's abounding in love and faithfulness, but we've hated the Bible and taught children what's evil, he maintains love to thousands, and we have millions of unrepentant people, he forgives wickedness sin and rebellion, but we haven't stopped doing such things against him.

But God does punish the children, and their children, for the sins of the fathers, unto the third and fourth generation. The generation of baby boomers who began to lead their children astray have lived for 75 years now. How long until the punishment comes? Not long.

The Israelites had 40 years after Jesus died and rose again until the Romans put an end to the temple. Enough for their children and their children's children to be punished with them. Its been 4 generations since WW2, we don't got much time.