A POS is someone who has an avatar depicting a swastika merged with a Pride flag or someone whose handle is JoeBidenSniffsKids or someone who spreads conspiracy theories and lies. I could go on...
Sorry about your grandfather but his death almost assuredly had nothing to do with the vaccine. The mRNA vaccines aren't even associated with blood clots - the J&J is but only about 4 people per million have had that issue. If he was old and had spent the entire pandemic in the hospital, he was likely sedentary, which could have been a main factor, as well as COVID itself. It's no different than saying he had a Bojangles biscuit a few days before he died so we know the sausage killed him. Lots of people have died after receiving a vaccine but not because of it.