Death Battle Season 9: We're Never Getting Galactus vs. Unicron, Are We?

[Lord Raziere]

Why? It was the right call. Should he waste time dramatically agonizing over it before doing it?

Uther was called a traitor because he explicitly and directly refused a (theoretically) lawful order from his (theoretical) superior. Which is treason. Jaina was not called a traitor, nor indeed did she particularly participate in the conversation except to call out Arthas as being rather rash with antagonizing Uther. Your description of events is simply not accurate.

Was it the right call? Stratholme remains in ruins to this day and was repopulated by undead, at his own hand. his "decisiveness" ended up causing the very thing he first at feared. he betrayed everyone, and thus everything he did up to taking the Frostmourne was for nothing.