Rushmore isn’t the Roman Martyrology. One can disagree with the choices while recognizing the good intentions.
Lincoln was dynamic, and had a big impact-—but that doesn’t mean he was good for keeping the Republic going the way it had been designed.
The important thing about Lincoln was his story of repentance, which is one reason why God gave him the victory. Certain revanchist-minded self-appointed authorities do often omit that story.