Just because you die doesn’t give you protection against criticism and the truth.
I remember when Richard Nixon died back in 1994 the networks talked nonstop about his role in Watergate and took glee in mentioning he was the only POTUS to ever resign the presidency. Powell and the Bush crowd got us into the Middle East quagmire that cost thousands of American lives and trillions of dollars. He did far more damage to this country than Trump ever has.