I wonder if the pro-closure crowd are refraining from posting because of all the nasty personal attacks
There are no "nasty personal attacks". Most likely they aren't posting because they aren't on MN.
There is also nothing "vile".
Children were screwed over in the last lockdown (and I say that as someone whose DD loved online teaching and had a full timetable of lessons - she would love them to close again!). For every child like my DD there are hundreds more whose mental health suffered, whose physical health suffered and whose education suffered. How do you propose to mitigate all that?