Why did the elements think Thrall's Mak'gora was dishonorable, but burning Teldrassil wasn't?

I challenge you to a duel but you’re not allowed to stealth or use Shadowstep.
Also let me start out at 35 yards. I’d prefer 40 but I don’t want you backing up out of spellcasting range.

Edit: The sad part is that I once actually lost a fight to a rogue this way anyway. He outdamaged me purely through Shuriken Toss and Deadly Throw back in WoD.