How could it not? I can hardly imagine a war that wouldn't kill any civilians. However, there is still always a question of degree, or in this case, of numbers. It's kind of silly (and morbid) to place an over/under for acceptable civilian casualty, but there is always a number at which it is clearly too much. Maybe that's a more probing question. 100 is almost certainly OK, 1000 probably, 10,000 possibly, 100,000 probably not, 1,000,000 hard to imagine.