Well said
Given that it typically takes at least two centuries for someone to be recognized as a "great spiritual figure" as opposed to a cult leader.... and non-orthodox Judaism has only been around for a hundred and fifty years, I would not expect ANY.
By the same token, I can only think of one widely recognized "great spiritual leader" from the 20th century, and Martin Luther King, Jr. is more associated with politics than with spirituality. C.S. Lewis might qualify as well; he's at least widely known and respected. even among the non-religious. But every other candidate I can think of (e.g. Mother Theresa) is generally only regarded as "great" by participants in that particular religion. You say "Mother Theresa," I say "L. Ron Hubbard."
Very well put. I might nominate Abraham Joshua Heschel, though; he's best known for his writing--astonishing stuff--but he also marched with Dr. King (You can see him in the videos, next to him. Big guy. Old. Beard.) He might be famous in a couple hundred years.
Martin Buber--oh, wait, he was a Chasid. Well, we read his stuff, too.
Really, it's hard to think of ANY world-class, great spiritual leaders from among the Jews, not since Jesus (we, uh, don't usually count him). I suspect that's because until recent times, no one much listened to our guys but other Jews. Maybe the Baal Shem Tov and his contemporary, the Vilna Gaon (who hated each other's guts, by the way). See, you've never heard of them.
As for liberal Jews hardly being religious--well, what to say? When we wore yarmulkes, tzitzit, and beards with earlocks, we were dumped on for being TOO religious and parading our faith too publicly. Some of us gave all that up and now practice our religion privately and unobtrusively like everyone else--and now, we're not religious ENOUGH.
"Ach. Goyim." (shakes head)
For the Catholics, we kind of liked John XXIII--Vatican II, you know. He won us over when he greeted the first Israeli delegation to the Vatican in centuries with open arms--literally--and the words, "I am your brother Joseph." (His given name was Joseph Roncalli.) John Paul II was a favorite of ours, too, for many reasons, but one stands out: when he was a parish priest in Poland, he was asked to baptize a Jewish boy who had been hidden from the Germans and whose parents were dead. He refused.
We liked Mother Teresa, too, but...
"A wonderful woman, but--Oy! So THIN! Someone should give her something to EAT!"
On the other hand, L. Ron Hubbard was a putz.