What Varian did was killing. The reason Moira and Dwarves didnt challenge Varian was because he would kill them.
The reason he didnt kill Moira was because Anduin stopped him.
You can justify his actions all you want, but what this practically was , is simply a display of power. And when the powerful oppress the weak (since the dwarfs had no chance) then yes, its very much murder even by your standards.
You say its an act of War, but they were Dwarfs. They are part of the Alliance. Even the Dark Iron , some were, all are currently. So its Alliance killing Alliance. And it worked perfectly for Varian to establish himself as the High King!
Thats the parallels with Sylvannas. But Sylvannas didnt execute an army of Orcs, she only hunted Saurfang.
She didnt kill Tauren, she only imprisoned Baine, and executed Zelling.
So as is obvious (not to your brain I know), the entire posts is about Strong leaders establishing themselves within their faction.
And somehow you bring Ashenvale and Horde attack nelfs into this ffs. Like we dont have enough nelf posts already
In a Civil environment, such as Varian Humans dwarfs, which is essentially people from the same side killing each other, civil war environment, its always murder!
Cause no matter your reasons thats like the corpse of your cousin over there… and that guys Aunt or something.
So yes Varian commited murder. And he would kill double the people if they were between him and his son. He would. He did. He would again.