We can have this "Tristano/White" discussion into perpetuity and make time stand still, or we can listen to the ways that it hasn't stood still, and the ways that Tristano has affected both white & non-white players (if only in terms of opening up a sense of "alternative-ness" to bebop and/or modality and/or free), how for those who aren't so hung up with anything except music that it has by and large become just that - music, and how for those who still want/need/can't escape the sense of eternal identity segregation (and they come in all hues), it will always be about more (and thereby less?) than the music.
For me, the latter route is much preferable, and much more real. Trisatano's "racial" significance relative to his music was of his time. His (& Warne's & Lee's) musical significance is of ours, or should be. Thinking of it as being a wholly "white" thing is old-school, and, truthfully, old-fashioned, irrelevant, and anti-evolutionary.
But that's just me.