Will there ever be a white nationalist movement that is not filled with weirdos, old men past their prime, extremists or incels?

In the past, those men that failed to launch would be wasted away in wars or disease. Now they are set to make up a good chunk of the population.

Lonely, bitter and sad little men. What should the government do with them?

They hold no stake in the future, they shouldn't have a say on important decisions.