19 Lord, my strength and my fortress,
my refuge in time of distress,
to you the nations will come
from the ends of the earth and say,
‘Our ancestors possessed nothing but false gods,
worthless idols that did them no good.
20 Do people make their own gods?
Yes, but they are not gods!’
These verses look forward to a time when everybody will realise that the "gods" that they worship - money, fame, power - are nothing more than worthless idols, and that the "gods" people make for themselves are not gods at all.
We need to get alongside the people who have been worshipping false gods, not to say "I told you so", but to be willing to pick up the pieces, make it possible for people to leave their idols behind, and show them the love of the one true God.