Okay dude, here is what this is what this is all going to come down to; you are adamantly insisting that Jet isn't black and you reference not only how he doesn't "look black in anyway," but that the casting call is an "inaccuracy" to the source material.
The problem here is that beyond the character name, or by grace of hinting at a place of birth (like in Faye's case, and this even assumes that Singapore in the Cowboy Bebop verse has a similar ethnic demographic as real world present day Singapore), all we know is that Watanabe didn't want the case to feel "American" in a homogenous sense. At no point do we have the world of God saying Spike is x, or Jet is y. All we have to go on is how they look, how they act, how they sound, and that can all be left up to interpretation.
You mentioned that Jet doesn't "look" black, when this is just patently false. This doesn't contradict any point of mine when considering that lots of groups can be off-white. Hell, viewing him as Iranian is a valid interpretation as well and at no point have I ever said that Jet is exclusively black and nothing else (I personally think it fits well). But in terms of his tone, someone viewing him as black is neither an invalid nor inconsistent interpretation or pereception of Jet. YOU may not think he "looks" black, but don't try to demean the people who do think so.
And in terms of his dub voice, at no point did I say that a dub voice can dictate a character's race. However, again, we have no guidance on the world of God of what Jet is. But for many, they watched the dub first (and this is significant due tomorrow how more popular Bebop was in the US than overseas), the of heard Jet's voice, they heard his venacular on how he delivered his lines, hell, they may have even looked up Beau Billingslea online. Based on that, again, reaching the perception of Jet as black is neither inconsistent nor invalid with what we know about the character.
But here we are; obviously the casters of the show reached the same perception and conclusion of Jet as some in this topic have reached, but yet you're out here saying that he isn't, or it's inaccurate to the source material, and you don't get why people are debating Spike's origins and want to drop "well, diversity is good, buuut..." bullshit.
There's no real reason why Jet CAN'T be portrayed by a black actor, freedom of casting or source material regardless, nor is it inconsistent or invalid based on what we have seen of this cartoon character. Whatever hang ups people have about Spike has nothing to do with Jet, and it is actually more depressing that you cannot even empathize or understand, or even seem to tolerate, this conclusion
