Ehh, I doubt you could distinguish the difference between a majority of 2nd generation Hispanic-Americans and "white" European ancestry people, by worldviews or looks (because the Hispanics have European ancestry too). Just look at the leading politicians in Texas, Ted Cruz and Beto Orourke and tell me which one is Hispanic and how it makes any difference. And this indistinguishability will only increase over time, where there will still be a "white" majority including most Hispanics, as the census currently does.
I know many 2nd-gen Hispanic-Americans and culture/value wise we're very similar. As a block they're just more traditionally Catholic, but religiosity is diminishing everywhere. Language-wise, many grow up not speaking Spanish, being a generation to feel 1 foot in both cultures but that will be gone with their children. Food-wise is the least of any issue, US loves cultural food and Mexican food is crazy popular, it already blends into Tex-Mex and Cal-Mex foods that US chefs already assimilate into new variations.
The fertility rate for minority ethnicities in the US has been declining rapidly to catch up to the decline curve for non Hispanic whites, so I’m not so sure this is true anymore. This is likely a combination of Westernization of younger minority generations (Hispanics specifically) and economic conditions broadly imho.
