I was very close to my non-JW grandparents. My parents didn't become JW's until they were in their mid 20's . My non-JW grandfather taught me how to fish as a boy and how to swing a golf club at age 14 on the driving range. We talked baseball, and were really close. Same as both of my grandmother's, they were always interested in what us JW grandchildren were doing- in spite of us being JW's.
Fortunately my JW parents didn't avoid their non-JW parents and I got to know them well. In fact, I give major credit to the man I am today to both sets of grandparents and give credit to my JW mom - who never shunned me when I finally left the cult. I've have been able to get to know my 1st cousin now these last few years , a non-JW , and we get along great.
I always experienced much more authentic caring and love from my non-JW relatives than I ever did from my older siblings, or other JW relatives. None of my JW family ever calls me to see how I'm doing, I've always had to call them. Then they act really put upon or bothered that I called. It disturbs them that this non- Christian sibling of theirs could ever act more " Christian " than any of them. They can sit on their thumbs and rotate for all I care.
I'm not going to lower myself to their level of behavior just because they want to be assholes. I'll take the humane and peaceful route. I don't pursue their friendship but every 3 to 6 months I'll call to see how their health is. My mom would have liked me to do that, so I occasionally check on my siblings. Peace out, Mr. Flipper