It's "fascinating" to you, but it seems you have been the one driving the conflict about what race Zimmerman is.
To answer your questions about whether I could be silent about his race... Yeah. Because in this case, his race doesn't matter.The person whose race served as any kind of stimulant in this matter was Trayvon. It doesn't matter what Zimmerman was, but that he (seemed to) have a problem with young black men. And that would still be true whether I call him white, Hispanic or whatever.
In other unjust killings in recent history like that of Sean Bell - killed by off duty police officers while leaving his batchelor party - some of the shooters were black or hispanic. The thing that caused all of them to tragically overreact was the race of the boisterous young black men they shot. I wouldn't give half a shyt if any of those shooters had been misidentified as Asian, because in that case as in this one, their race doesn't matter.
It is the defenders of Zimmerman (not saying you are, but you seem to have this in common with them) who are making a big deal out of the fact that Zimmerman is Hispanic and not white. They also never miss a chance to throw into the discussion that Zimmerman had black acquaintances and friends. They make these points to attempt to deflect and mitigate the evidence that says he acted out of racial bigotry toward young black men. Not saying you are making the point about his race for the same reason, but you have making the point in common with them.