New Revised Standard Version
Then they will say, ‘Because they abandoned the LORD the God of their ancestors who brought them out of the land of Egypt, and they adopted other gods, and worshiped them and served them; therefore he has brought all this calamity upon them.’”

Contemporary English Version
Then they will answer, "It was because the people of Israel rejected the LORD their God, who rescued their ancestors from Egypt, and they started worshiping other gods."

New American Bible
And the answer will come: “Because they abandoned the LORD, the God of their ancestors, who brought them out of the land of Egypt, and they embraced other gods, bowing down to them and serving them. That is why he has brought upon them all this evil.”

Douay-Rheims Bible
And they shall answer: Because they forsook the Lord the God of their fathers, who brought them out of the land of Egypt, and laid hold on strange gods, and adored them, and worshipped them: therefore all these evils are come upon them.

And they shall answer: Because they forsook the Lord the God of their fathers, who brought them out of the land of Egypt, and laid hold on strange gods, and adored them, and worshipped them: therefore all these evils are come upon them.

Because they forsook

Judges 2:12,13 And they left the Lord, the God of their fathers, who had brought them out of the land of Egypt: and they followed strange gods, and the gods of the people that dwelt round about them, and they adored them: and they provoked the Lord to anger, . . .

Jeremiah 1:16 And I will pronounce my judgments against them, touching all their wickedness, who have forsaken me, and have sacrificed to strange gods, and have adored the work of their own hands.

Lamentations 2:16,17 Phe. All thy enemies have opened their mouth against thee: they have hissed, and gnashed with the teeth, and have said: We will swallow her up: lo, this is the day which we looked for: we have found it, we have seen it. . . .

Lamentations 4:13-15 Mem. For the sins of her prophets, and the iniquities of her priests, that have shed the blood of the just in the midst of her. . . .

Ezekiel 14:23 And they shall comfort you, when you shall see their ways, and their doings: and you shall know that I have not done without cause all that I have done in it, saith the Lord God.

Ezekiel 36:17-20 Son of man, when the house of Israel dwelt in their own land, they defiled it with their ways, and with their doings: their way was before me like the uncleanness of a menstruous woman. . . .

therefore

2 Chronicles 36:17 For he brought upon them the king of the Chaldeans, and he slew their young men with the sword in the house of his sanctuary, he had no compassion on young man, or maiden, old man or even him that stooped for age, but he delivered them all into his hands.

Daniel 9:12 And he hath confirmed his words which he spoke against us, and against our princes that judged us, that he would bring in upon us a great evil, such as never was under all the heaven, according to that which hath been done in Jerusalem.