My cousin’s athletic and wholesome 13 year old who had no history of health issues collapsed on the playing field at school. He had a stroke but fortunately did not die. He has permanent brain damage. When my uncle suggested to his son, and his wife that maybe the vax they forced their son to take might have had something to do with it... the two of them who are both college professors attacked him with a vengeance.
My little brother who had been a captain at a major airline for decades was grounded for a swollen and enlarged heart shortly after he was vaccinated. His aorta is also now bulging. He has always been very athletic and health conscious. It is a little hard to believe that he could just drop over dead at any time.
Sorry about your cousin...and your brother too! It must be difficult for you to remain even-tempered about all of this.
The thought that they are responsible for killing their son is too horrible for them to contemplate. They will self delude themselves into believing anything so long as it leaves them blameless for their role in causing it.
Also they have arrogance in thinking that less educated people could dare tell them they were wrong on such a fundamental issue as their child.
I think they may eventually realize they were wrong, and cry out in anguish for what they have done, but this probably won't happen until a preference cascade among all the intellectuals flips what they believe.