The author’s rhetoric is likely the cause of the downvotes, in particular focusing explicitly on “undocumented immigrants” when there seems to be no evidence that this group of people presents any greater (or lesser) risk than other groups that share their socioeconomic or demographic status.

To contrast with your interpretation, I found the author’s comment to be unnecessarily divisive.

Consider, for example, that Asian people are being harassed and assaulted in response to how aspects of this pandemic have been framed.

Now consider the response that the author’s comment might incite towards demographics associated with undocumented immigrants, in light of this, given that there is no reason to believe the premise.