The trades have been experiencing a labor shortage since – at least – the pandemic (and the Great Recession before it). This has driven labor rates significantly higher and resulted in a windfall for those currently in the trades.
Why would your concrete sub want a larger labor pool that tends to depress both hours and wages?
Conversely, if we further reduced that labor pool through somewhat draconian means, what effect would that have on the labor pool and wages?
Of course, another way to increase the inventory of available homes is to deport their rightful, current occupants.
Unfortunately, this increase in supply would create downward pricing pressure on the housing market, generally – something existing homeowners and (institutional) investors likely wouldn’t appreciate.
Also, African-Americans and Latinos tend to be fairly religious; therefore, the culture war nonsense has tended to animate them more than the median voter.