The idea that it's unacceptable for a country conducting a census to ask whether respondents to that census are citizens of the country in question deserves more scrutiny than it's getting from most Democratic-aligned groups.
It's almost enough to make me wonder whether the intent here is not so much genuine concern as a desire to preemptively cast doubt on the legitimacy of the 2020 Census. I recall politicians in NYC getting a great deal of political mileage out of complaining when the previous census showed surprisingly unimpressive population growth throughout the city.
Pretty much, yeah.