What happened to Judah?

Answer 1

Judah, which was composed of the southern tribes did fall because the people were wicked. The people of Judah were wicked and had turned away from God according to The Bible. Judah eventually fell when the people refused to repent.

Answer 2

If you mean the 'progenitor' of the modern Jewish peoples, he died as all humans do.

If you are referring to the Kingdom of Judah, it was conquered by the Babylonians in 586 B.C.E. and its upper-class population was deported.

Answer 3

1) The general spiritual reason was that God found the people of Judah to be below the spiritual level that was a requisite for having His presence among them. The prophets had warned them (Jeremiah 7:25) but were not sufficiently heeded (2 Chronicles 36:16). Once God's presence no longer felt welcome in the Holy Temple, its destruction was just a matter of time (Talmud, Rosh Hashanah 31a, and midrash Eichah Rabbah 1:43).

A more specific spiritual reason was the egregious sins of Menasheh, king of Judah (2 Kings 21:11-13 and 24:3).

2) The temporal circumstance was the fact that King Yehoiakim, after having been obedient to Nevuchadnezzar (king of Babylonia), became insubordinate (2 Kings 24:1); and Nevuchadnezzar responded by conquering the land of Judah, destroying the First Temple and exiling the populace.Some positive results: the false prophets, at long last, were silenced forever. They had predicted that Judah would remain independent of Babylonia (Jeremiah ch.27) and no Destruction would take place.

Also, the lure of idolatry finally weakened, since the Destruction and Exile happened exactly as predicted by the true Prophets, who were the same ones who had spoken ceaselessly against dabbling in idolatry.