This new Spider-Man aside, I think Peter Parker should be white, but that's just my opinion. Spider-Man doesn't always have to be Peter Parker, but I think Peter should be white. So if he were re-imagined today, I couldn't see him being black, Hispanic or Asian. What if Bruce Wayne or Clark Kent were black? That would just be weird, because they're so iconic. Sure, being white isn't exactly one of their defining characteristics, but it fits them.
What does that have to do with anything? Even if he'd been Jewish (as Bendis tried horribly to do), he's still WHITE. Judaism is a Religion, not a Race, it's no more a race than Catholicism or Islam.
Secondly, they're not making Peter blended race, they making the new Spidey blended race. So you concern of them not making Peter white, is kind of moot, now isn't it?