Okay. But if our Founders had done that re: slavery, our country and Constitution would probably not exist.
I can't assert this with certainty, of course, since it's impossible to predict the "what-ifs. It may be that our Constitution would have been ratified years later than it was, but that we would have avoided the Civil War (Given the grasp of history that shines through your posts, I suspect you've read "What If?").
It's still a fact, though, that even our Founders turned to state-based incrementalism in order to deal with issues that are unquestionably unalienable rights, but that the nation was too divided to deal with federally. It's possible they were wrong to do so; but the fact that they did tells me that an incremental, state-centered approach to abortion is in line with what they might do were they here today.
But abortion has already killed far more Americans.
You think God might call that to account?
"Fondly do we hope, fervently do we pray, that this mighty scourge of war may speedily pass away. Yet, if God wills that it continue until all the wealth piled by the bondsman's two hundred and fifty years of unrequited toil shall be sunk, and until every drop of blood drawn with the lash shall be paid by another drawn with the sword, as was said three thousand years ago, so still it must be said "the judgments of the Lord are true and righteous altogether." - President Abraham Lincoln, Second Inaugural Address