I'd suggest that it never mattered. Legality has always been a red herring. The concern is immigration, legality notwithstanding, but legality is a way to obfuscate.
It's so funny because I've seen legality offered as the sticking point when, in the very same breath, the actual issue is clearly stated to be immigration itself.
An increase in population by immigration, legality notwithstanding, necessarily increases population density, even if an increase in population density doesn't necessarily decrease quality of life for citizens. And obviously citizenship is a substantial leap from legal residency, but the latter doesn't receive the same consideration with regard to quality of life...because legality isn't the actual issue.
Also funny is that particular nativist parasite isn't only non-native, but it's also apparently neither citizen nor resident. It apparently resides in a country that isn't the United States. National borders are so important...except when they're not important at all. Weird that nativist parasites, like nationalists (and there's significant overlap between the two), are so concerned by matters in countries that are not "their own."