on that whole "jaina versus blood elfs" thing, I often see people saying the blood elfs made the mana bomb that destroyed her home. I don't think that's what happened at all. let's take a look at it:
this is a blood elf mana bomb:
take a look at the details of obvious elven craftsmanship.
now this is the mana bomb that flattened theramore:
look at the sloppiness of obvious goblin craftsmanship. lots of uneven metal plates riveted together looking bound to failure. the exposed screws holding the two sides of the bomb together. elven pride would never allow a blood elf build something this messy for any reasons besides humor.
I don't think blood elves made the bomb. I think garrosh ordered the goblins to do so, based on kael'thas' old mana bombs. if there were blood elves involved, they were few and couldn't say anything about the bomb's design.