The vaccines are only 85-99% effective. So your family is still at risk for getting and spreading the infection. And if you're the spreader, it's possible that it would be a resistant strain.
My attitude mirrors that of your family. And it has more to do with doing ones part to combat this pandemic and return to normal. I got a vaccine less for my own person safety, but more for the good of society. I want people to be safe, feel safe, and I want front line workers -- who've given so much -- to finally get a break.
You're not willing to make this same, minor sacrifice for society that everyone else did. It makes sense that you'd be shunned by people who want this to be over with.