What does Isaiah 5:16 mean?

The people have had their pride pummeled into the ground. The self-deluded, self-exaltation of the people of Judah will come to a sudden and violent end. No more living for acquisition or partying or the praise of their peers (Isaiah 5:8–12). All will be stripped away, leaving only forced humility at the hand of God (Isaiah 5:13–15).

The Lord will not be humbled, even as His people are carried off to Babylon (2 Kings 24:14). He will be raised up. God will prove His ability to follow through on His promise: He will judge the wickedness of His people and hold them accountable for their sinfulness. He will show that He has not ignored Israel's defiance against Him. He has not stopped being holy because His people have given their hearts to false gods and immorality (Isaiah 2:8). The judgment He will bring will establish once again that the righteous God of Israel is holy and demands holiness from His people.