All the Rabbonim I know of and respect have made clear time and time again the importance of following government COVID-19 regulations, such as masks and social distancing. There are a handful of true Gedolei Torah today who mamesh don’t have any connection to the world other than a series of heavily filtered shaylos brought to them by gabboim and relatives. Those Gedolim, unfortunately, are sometimes fed bad information and release strange or contradictory advice.
Therefore, the people who are disrespecting Rav Zilberstein SHLITA clearly have no love for Hashem’s Torah and those who teach it to us to begin with so I suggest we don’t give them a second thought.