God should be the only one who has final say on who is immoral and who is not. We should not play God and decide which people are worthy of this Earth and who is not. In the end God knows and understands what that person did and will make the final decision.
God even ordered people to take lives before, so people
should understand that it is acceptable for human beings to take lives under
certain conditions. David slew goliath
to save his people. The old testament of
the Holy Bible says that it is alright to take an eye for an eye and a life for
a life, and I agree.