I would disagree. Would you call someone "mean spirited" if they condemned the actions of som? Of course not, right? This person just suggested state sanctioned murder of a foreign national visiting family in the US because he was carrying an infectious disease. If someone can't identify what is wrong with such a suggestion, I would suggest many people failed them during their most important developmental years because somebody with a healthy understanding of science, health, safety, medicine, etc. wouldn't reach such an alarmist conclusion, and if they did, then I'd suggest they have mental health issues and should seek treatment.
What's next, murdering people who carry HIV?