I assume from your broken English that what you meant to say was "people's hope that this death was caused by the vaccine is bordering on the pathological".
It can also be said that people's hope that this death WASN'T caused by the vaccine is bordering on the pathological.
Facts matter, no matter what your prejudice might be.
I think he meant to say, “people’s hope that this is vaccine related is bordering on the pathological”. Looks like a bad auto-correct from a typo.