"No. The churches and Christians have always been clear that taking a life, although evil, may be justified"

Nonsense Keith.

You, I and everyone else who has contributed were brought, up with a commandment that stipulated "Thou Shalt not kill".

No if's no maybe's.

It is the thing we were all taught from being small children.

The church(s), no one else, have altered that in very recent years to read thou shalt not murder.

I, and I suspect many others, prefer the original.

Sadly others, like yourself, seek to justify killing.

It is really that simple.