Don't argue with anyone over what is self-evident.
Don't try to prove something that everybody already knows.
Instead, do what the founders of this great republic did: Simply assert self-evident truth.
"We hold these truths to be self-evident, that ALL men are CREATED EQUAL, that they are endowed by their Creator with certain UNALIENABLE rights, that among these are life, liberty and the pursuit of happiness. That to secure these rights, governments are instituted among men..."
-- The Declaration of Independence
Unborn babies are human beings. They are persons. You know it. I know it. Everybody knows it.
And the equal protection of the right to life of all persons is absolutely required by God and by the supreme law of our land, the Constitution.
"You SHALL NOT murder."
"NO PERSON shall be deprived of life without due process of law."
"NO STATE shall deprive ANY PERSON of life without due process of law; nor deny to ANY PERSON within its jurisdiction the EQUAL protection of the laws."
There are no exceptions.
It's not optional.
Stop acting like it is.