Your family members are going to get covid eventually one way or another. The vaccine as I understand it only preps the body to respond to covid when a person catches it and is supposed to reduce severity, but it hasn't stopped many fully vaxxed from ending up in ICU anyways. In order to achieve "herd immunity" according to the Mayo Clinic 70% of people have to "recover" from covid, so that would have to include many fully vaxxed having to catch covid. So your dad essentially cut ties with you for no reason, which is really saddening.
Your family members are going to get covid eventually one way or another. The vaccine as I understand it only preps the body to respond to covid when a person catches it and is supposed to reduce severity, but it hasn't stopped many fully vaxxed from ending up in ICU anyways. In order to achieve "herd immunity" according to the Mayo Clinic 70% of people have to "recover" from covid, so that would have to include many fully vaxxed having to catch covid. So your dad essentially cut ties with you for no reason, which is really saddening.