If ending life was mortally wrong, you could be sent to Hell for washing your hands and killing all those germs.
One interesting thing is how the bible (can't remember exactly) either outright states animals don't go to heaven, or we've somehow come to that conclusion. Whatever the case, if this is the conclusion, then there has to be a metric for what classifies as "protected life" and "unprotected life".
I think something that has the ability to think, feel, construct patterns and make rational and logical arguments is "protected". A zygote, an animal and a bacteria don't have these abilities, and therefore they are unprotected.
Another 2c from me. Not trying to fling stuff around and I like all of you guys; just trying to bring some opinions to the table.