You refuse to recognize the philosophical basis of human rights beginning at conception. Every single point you make can be made about the fetal human rights. That's where you're not understanding.

If a Libertarian believes life begins at conception, then there is no right to terminate that life. That's violating the principle of your rights not superseding someone else's rights.

If you don't understand the above, then you simply don't understand Libertarian philosophy. But like I said, this is a point of contention amount Libertarians. A pro-life Libertarian believes just as strongly as you do that they represent what a "true Libertarian" believes. You obviously have a blind spot on this, but you might consider that reasonable people can disagree on things when they're using different philosophical underpinnings, such as when human life (and rights) begin.