From a data suppression standpoint, it's super duper relevant. Someone who is undocumented will never respond to the census if that question is on there. Particularly when the government is running for-profit baby prisons for brown people. This accomplishes the GOP goal of undercounting the brown people so areas with lots of white people get more representation than they deserve.
This is only a concern because the government is stepping up enforcement of immigration laws. We can’t even agree if there is a border crisis or not, depending on the day and narrative. I would say from a budgetary standpoint it would be super duper relevant to document the undocumented population.
Plus the guy who came up with it said it was a political/race thing.
It was a political thing for a nation increasingly split across racial barriers. The recent housing initiative in LA failed for similar reasons.
This is exactly the purpose of voter ID laws. Suppress some small percentage of poor/non-white people and you'll win some elections you wouldn't otherwise. It's all about clinging to power as white people inevitably become a plurality within 25 years.
And when I deployed overseas, the blue state I was a resident of did not make it easy for me to partipate in the very freedoms I served to defend, but I still managed to vote, so I have little sympathy for the suppression argument. I do however support online voting and making election day a holiday and/or extended over numerous days.
SCOTUS is about to weigh in on partisan gerrymandering based on cases that reflect poorly on separate incidents of GOP and Democrat shenanigans.