I'm not sure if this is really an AIBU but I don't know where else to post and maybe IABU for being worried about this...
My Dad, in his 70s, lives alone, has always been free-market right (socially he's more liberal).
He subscribes to e-news sites and gets update emails from right wing media sources, which are all anti-lockdown, anti-vax, anti-woke. He often sends us (his children, sometimes his siblings) long ranty emails, forwarding 'The Truth' about 'Covid lies'.
He uses terms like 'face nappy' for mask, 'sheeple' for anyone who doesn't agree with him, and talks about 'that commie on sage' - not sure if he means Whitty or Valence or someone else.
He is convinced that his grandchildren are in grave danger of hospitalisation if we have them vaccinated.
He doesn't listen to reason - I've tried telling him that no-one has offered to vaccinate my children yet, that all his children and their spouses are double vacc'ed (we did think long and hard about accepting the vaccine, we're not idiots, and we are all fine.)
He went through a similar phase around the time of Brexit - he was an ardent Leaver.
What can I (we - my siblings have the same problem) do? I don't have the energy to engage with his nonsense. We've already told him not to send on these emails, but he sent 3 just last night. If you argue back he gets very aggressive.
I'm worried about his mental health. Has anyone experienced anything similar / got any ideas about what to do to help him?
FYI so as not to drip feed - 2 of his 4 kids live abroad, myself and one other in the UK, we have our own families / jobs / school aged kids and live 2-3 hours drive from him, so are not in a position to check up on him in person on a frequent basis.