I think that framing makes the argument vacuous. If an action is framed as murder, how would OP defend in the first place? Any argument would be tough to carry. It would be arguing against a tautology. You are right to mention how the "debate" here is people asserting their arguments.

What I find most tough to carry is the consequent: there are ~600,000 (rough number of abortions per year in USA) people "murdering" their own "children" every single year. I suppose in the process of putting their faith in god these people have removed all their faith in humanity...