I don’t attribute W’s victory to Nader.
True, the Democrats did not completely master the art of stealing elections until more recently.
In 2000 in Florida, Nader won 97000 votes, almost all of which would otherwise have gone to Gore. Bush won Florida by a few hundred votes, and was elected by a four electoral vote majority. it would be entirely rational and historically accurate to say that Bush’s victory was made possible by the Nader third party candidacy.