Enh. In the abstract, suffering and death are bad, and no-one deserves either. But in the specific, it's a very good thing for someone who has contributed to much suffering and death to no longer be capable of inflicting more, and it is not shameful to be pleased at the news that such will soon be the case.

Would it be better for that to happen without suffering and death on the part of the perpetrator as well? Yes, of course. But that small added badness does not outweigh the imminent much larger reduction in badness.