He concludes that Europe will slowly fall away into insignificance.
I would argue that they are well on their way right now.
Their military can’t protect their own countries, their per capita income is not so great (France has the same per capita income as Mississippi - 46th in the US) and here are large areas of Muslim ghettos where non-Muslims dare not go. Their countries are more socialist that capitalist. Some 2% of Europe is Christian and most people are secular.
They have been swirling down the toilet for decades and the flush will be complete sooner rather than later.
Even in the most highly secularized lands like Belgium, 15-20% of the people attend Church every week.