Help me understand John Coltrane .... seriously.

maybe you don’t like saxophone in case of Coltrane.

Love sax.

Then it’s obviously his style of playing.
It’s totally fine to respect a great musician and not like him.

As others have said, for easy listening get Ballads or his corroboration with Hartman and/or Ellington. But if you're really serious try a late night listening session with my personal favorite, Crescent. If you don't get it after that, you never will.

Totally loving the Kenny G stuff here!

As to Coltrane, well, so you don’t like it - move on. I love Interstellar Space but, then again I’m totally into Lustmord, Zoviet France, Paul Panhuysen, Stockhausen, Sun Ra, Whitehouse, John Zorn, Napalm Death... He totally makes sense within a spiritualist, atonal, alternate scale, meditative, Soul centered universe. Music is the mirror of consciousness - its vast, so you'll find some you like somewhere.

My favorite was when my Dad bought the Village Vanguard sessions. He was a 50’s jazz guy (Brubeck, Erroll Garner, MJQ)...lasted one minute before he gifted it to me. Ha!

Herbie Hancock (Water Mellon Man), Vincent Ingalis  (NastY) Daft Punk (4Ware) will get you started in the right direction.