(Spoiler) Did you want...
... the alien kids to be killed at the end?
The character of Hit Girl in KIck-Ass murders more people thant the kids in both verions of Village of the damned, plus Mikey, The Bad Seed, and The Good Son. So why do most audience members whant Hit Girl to live and the other "Evil KIds" to die?
Remember that the kids in Village of the Damned didn't ask to be incarnated amoung billions of often belligerant Humans in an attempt to inflitrate and gain control of Earth. They probably would have preferred to have been born on their home world where it was a lot safer and there wouldn't be any Human kids to tease them about heir oddness.
I say that fimmakers use varius technigues to make you feel affection or hatred for variouss characters and you should try to be aware of that and judge how much characters should be like by objective criteria.