Thank you for all that you have done to keep children safe. Please follow your union advice and know that many, many parents support you (even if they don't necessarily post angrily on covid threads).
You are not to blame for any of this, the Government is. They are refusing to follow the science and whilst children are better off in school, that doesn't supercede your right to a safe workplace.
I speak as a parent who will struggle to work if schools close and who's autistic dd regressed significantly last lockdown. But I still support this closure.
Sorry that you get such a slating.