You’re making less and less sense.
Oh, come on, it is a simple thing. Your argument is that abortion is the "killing of an innocent person" and therefore is subject to Federal authority via the Declaration and the Constitution. However, most murders are the "killing of an innocent person" and yet they are most assuredly and absolutely not subject to the Federal government. Such matters are most definitely reserved to the States, and yet you don't seem to be on a tirade about the evils of such a situation. But, either all such homicides are actually not a matter for the States, and rather are Federal, or you are saying that all of the people murdered in this nation (outside of abortion) are in fact not PERSONS.
Which is it? Are all of these murder victims PERSONS or aren't they? It is a simple question. If you say they are persons, then allowing the States to legislate, enforce and prosecute their murders is to "deny their protection under our Constitution," to use your own language. That certainly has been your position regarding abortion, and so either it applies to all murder, or it doesn't. So, I ask, are these people PERSONS?
You’re not listening. If a state is not protecting the unalienable rights of the people, the officers of the federal government have a sworn duty to secure the people and their rights. This is not complicated.