On the other hand, Firenze’s mistake was going into self-indulgent rambling instead of just killing the person he wanted to kill (especially with the stakes apparently as high as the survival of the universe). I get the feeling that Voldemort, who had his own Evil Overlord List, would find this particularly distasteful.
Well, given his actions in the past he can hardly call this idiocy worthy of being killed. Also, Firenze was not annoying him by being an idiot, he was annoying him by threatening Harry, for whom he had other plans.
On the other hand, Firenze’s mistake was going into self-indulgent rambling instead of just killing the person he wanted to kill (especially with the stakes apparently as high as the survival of the universe). I get the feeling that Voldemort, who had his own Evil Overlord List, would find this particularly distasteful.
Well, given his actions in the past he can hardly call this idiocy worthy of being killed. Also, Firenze was not annoying him by being an idiot, he was annoying him by threatening Harry, for whom he had other plans.