re: How will young conservatives grapple with the fact that they are outnumbered?

In some ways yes, but in other ways no, especially the LBJ great society legislation. I think people naturally grow out of supporting pie in the sky social and economic programs as they get older. A good example of this is climate change -- most of the college kids who are worried about that now will not care about it in 10 years, maybe less, and that is perhaps the biggest plank in the current Dem platform besides maybe abortion and identity politics.

The one thing I will agree with OP on is the anti white racism emerging in this country. That is a new wrinkle, and could affect my 1968 analogy. I remember thinking back in 2017 when the City of NO took down the confederate monuments that it was an opening salvo of this movement, and no matter what you may think of someone like REL, it just emboldened them to keep going, taking down statues of Thomas Jefferson and Teddy Roosevelt, etc. They want to erase white history.