I get in to those disscussions too useally with my Mom she thinks cats are just barn animals. (guess why it took along time for me to understand cats as pets) Lately she's been on me to make my pregnant daughter get rid of or put house cats out side. Thankfully there is about 6oo miles between us so she doesn't waste the money of long distance on it for long.
You can't change some people. Just pray for their animals and hold your tongue when around them .
You should just leave in these situations.