I have killed ticks and other bugs that can carry disease and not felt bad about it. I actually save bugs though. If I see a harmless bug on its back I will flip it over. Or I will save a drowning bug. If someone tries to kill a bug and its harmlesd I will get it and take it outside. If someone steps on a bug and its still alive and suffering I will end its pain. I have animals loved animals. So, no I dont really think that is normal.