When illegals aliens arrive in California, they have to live somewhere and it's not going to be for free. Hence, California Landlords have lots of pricing power and can pick whoever pays the most rent. Hence, those California Hispanics who think a Wall is racist should look at their housing costs and ask, Would rents go higher with more illegals in California?
Since the US / Mexico Border is porous, there are just too many illegal aliens moving to California. By putting a WALL, you slow down migration and hence you give time for housing stock to catch up and allow for housing stock supply & demand to balance out instead of Bubbling Up, and Bursting.
Newer Illegal Aliens are desperate & will undercut any existing Hispanic Worker in California, legal or illegal.
Can you expect all those Illegal Aliens not to work for less? No, you can't.
Accordingly, that puts salary & hourly wage rate pressure on Existing Hispanic Workers in California, legal or illegal. California Hispanics can't have it both ways. They can't support illegal immigration and expect to have the same salaries.