but the government tried to be fair to open them in what was clearly going to be a staggered approached and many unions, teachers, parents and schools kicked off.
What planet are you from? I literally have met no one yet who can describe the way Boris announced the opening of schools as a fair approach. No one yet knows why he chose the year groups he did. No one yet knows why schools were instructed to prioritise these year groups in a way which would make it really difficult to then admit other children. The blame for no more year groups in to date lies squarely at number 10.
I don't personally agree with the NEUs stance on September opening, but one question I thought was a really good ask of theirs early on was, what modelling have the government done on the potential rise in R through the opening of schools?
The govt's belated response to that showed us all exactly how little attention the government were paying to the scientific advice - and since then more and more has come out about this, as the OP points out! Across all areas of life, policy and populism has won over science, and it's nowhere more visible than when the public start sniffing around now that they've had enough and can't put two and two together about who's to blame and who they should be shouting at.