"...too often have embraced the most xenophobic and anti-intellectual tendencies...."

Reactionary white Catholics (having fewer children, among other things) generally make up a demographic generation that is vanishing. Today, half the Catholic population, heavily Asian and predominately Latino, is in the far West, South, and Southwest. There will always be white Catholics of Irish, German, Polish, Italian, Portuguese, British or French backgrounds, but they will be a minority overall, especially as the US continues to grow browner and less Euro-American. Catholicism's most universal quality will continue to be its diversity, even in the US.