Putting aside for the moment the definitions and the philosophical phrases, one thing seems clear to me.
Love is a verb.
It's an active thing you put into practice, something you "show" by your actions. You can talk about it all day (and dubs do), but it's what you do when the chips are down that manifests real love. You can call it conditional/unconditional, or whatever, but it doesn't matter what you call it. What do you DO?
When I was "in" the JW ranks, I was a judgmental hypocrite. I belonged to an organization that claimed it was the embodiment of Christian love, God's love. If anyone walked off the path, even just a little, they were slapped upside the head with a sledgehammer. We called this treatment "love," as in "Disfellowshipping is really a loving thing to do." And we'd quote (and misapply) that scripture that says the father who really loves his son, disciplines him.
Once a dub was branded "weak" or thought to be lacking spirituality, the "love" was withdrawn, replaced with judgment. The sad truth is, as JWs, we shot our wounded. And we called that love.
Now that I'm once again a member of the human race, I "love" people. I show love -- basic human kindness -- more readily than I used to. I love them by giving them the benefit of the doubt. I love them by respecting their belief systems and habits, even if I don't agree with them. I love people by letting them be who they are and not judging them.
I think that's what we're talking about here. Call it unconditional love if you want. It may not be completely unconditional. But it stands in stark contrast to the clearly CONDITIONAL love we were taught to practice by the Watchtower.