Hmm. Yes and no.
Clearly, a grown person who has committed heinous crimes against others, and continues to be a threat - this person's life is worth less than an innocent not yet born in my eyes.
That being said, this line of reasoning has a huge downside, as it's often used geopolitically to excuse invasions and mass murder by governments.
I'll never forget a church man I once had a private conversation with. He was well known in the large church I went to. He sung in a church quartet. He sung solo during Christmas for the congregation. Not that anyone thought of him as a model Christian or something, but let's just say he was fairly respected.
In a private conversation he said, with a smile of appreciation, that all the goings on in the middle east at the time were to secure oil for the US. This is a statement that, although a little too broad, I mostly agreed with. However my agreement was just in the matter of fact, and his was clearly admiration, which I found disgusting, because of all the lies and killing involved.