Scalia could agree to disagree in a civil way with people of similar standing.
That said, he did not agree to disagree in a civil way from the bench, where it mattered to the masses.
He have been a a principled man in certain areas, in his ideology, but he was not a principled man in his application of the law.
Scalia was a bigot. Scalia was ignorant. He may have had a brilliant mind for writing rulings, he may have been the unexpected hero of the marriage equality movement, but he was the epitome of what a SCOTUS Justice should NOT be - fiercely partisan in behavior and loved to play politics, openly touting how he knew how he would rule on a case before arguments were made regardless of what is presented,
The man is dead. The world is a brighter place. I hope it was a slow, lingering and scary death. The man doesn't deserve mercy or pity. His actions as a consequential public figure do not earn sadness from sane people.
(and while they are obviously vastly different, even Hitler had friends who were sad to see him die... So did Bin Laden. So?)