So true. I can confirm this. My older brothers far more than my older sisters my parents had difficulty with and difficulty understanding. Peace, love, anti everything that was the norm, drugs, long hair, easier sexuality and free love, running away with friends, etc. it was a difficult time between generations. . Our family came through it but there were rifts, long ones through those years and even in some later years, the later years being the late 70s/early 80s. So many in late 60s to mid 70s hitchhiked, left home, "lived off the land", etc. that it isn't surprising the number of missing or UIDs from the 70s honestly. It saddens me, some just trusting in all or anyone they encountered imo. My brothers didn't embrace all of these things but some and parents were just the opposite, many having come through the wars, the depression, having pride in country, etc. The era of the Vietnam war in the 60s and 70s as well and draft dodging and more. On the flip side, that free behavior had some joining the military due to the consequences of fathering a child unmarried, telling their parents or having to pay child support.
We never had any of that but my parents were absolutely mortified as was grandma when one of my brothers lived with an older woman with a child and dated her or "lived together" was the term that was NOT okay and against the rules. Now everyone does can you imagine? He was probably like 19 and she 22 or 23 with a 4 year old son. My youngest sister and I were forbidden from walking a few blocks to see them (but did so anyhow., that just made us wonder what the big deal was and we loved going there and playing with her little boy and thought they were so cool they had their own apartment, etc. in town). I cannot even believe today this was my parents or that was that time period but it was. It was shocking, you didn't do that, family didn't want to be judged by neighbors and more for their teens or adult young chlldren behaving in such a way. Uhm they weren't harming anyone, there are far worse things but it all was very shocking this rebellion to that generation. They pushed peace and such things all while in total turmoil at home with their parents, no peace in that respect...
Anyhow.... Most came through it but things happened in those years I don't doubt that families slid under the rug or made choices that seemed maybe they thought the best decision for what they were dealing with and then years later how do you come back from it.... Or admit it... So did their adult children make choices that some probably stayed with (like drugs) and some grew out of and matured.
I don't know enough here, just have been reading to get the gist of it but it does sound as if there may have been some rift or hard feelings and then stubbornness too may have set in (a LOT of that in my family in those years, still some traces today...), the stubbornness part)...
I know none of this helps, just a post to kind of touch on those years and how it isn't necessarily anything nefarious which is a good thing, hopefully he is still living or did have a good life...?