Before the shots were widely available, I was 100% with you. I've lost people close to me and it sucks.
Now that in the US and EU (where I hang my hats) it is easy to get vaxxed - and (big caveat) I don't have anyone in my life who is at risk and can't get vaxxed themselves - I really don't care what the unvaxxed do.
I'm 3x vaxxed and so is everyone I know and care about who wants it. My sister and her husband are not, but they've both had covid. Really good odds I won't get sick and die when I eventually get covid, and whether someone else is vaxxed or not has no effect on me in that sense. Vaxxed people spread covid too.
Sounds like the anti-vaxxer was just a dick.