Doesn't say anything in there about protecting lives.
secure the Blessings of Liberty to ourselves and our Posterity,
I guess you missed that part.
pos·ter·i·ty(p-str-t)
n.
1. Future generations: "Everything he writes is consigned to posterity" Joyce Carol Oates.
2. All of a person's descendants.
"Posterity" not only includes the unborn, it includes generations that are still unconceived.
The founders put the unborn, and future generations, on the same plane as themselves when it comes to the right to the blessings of liberty.
Abortion is genocide, and under the original founding principles of America, it is insane to say that there is a right to commit genocide against Americans.
I think that's a stretch. This is why they call Democrats, "liberals". They want a very liberal interpretation of the Constitution. Reading it that way gives them the authority to do just about anything. Posterity? How about a federal ban on condoms or even the rhythm method of birth control.
The preamble states the intent of the Constitution. It does not even begin to dispense authority to the states or Congress.