The difference was that the 80s Republican politicians still loved America.

Sorry but that's just not true. The heritage foundation has never loved america and has never produced an american-loving republican, only capitalism and capital-loving republicans. https://en.wikipedia.org/wiki/Reagan_Doctrine#Origin_and_advocates https://www.heritage.org/conservatism/commentary/reagan-and-heritage-unique-partnership
With the arrival of the Reagan administration, The Heritage Foundation and other conservative foreign policy think tanks saw a political opportunity to significantly expand Carter's Afghanistan policy into a more global "doctrine", including U.S. support to anti-communist resistance movements in Soviet-allied nations in Africa, Asia, and Latin America. According to political analysts Thomas Bodenheimer and Robert Gould, "it was the Heritage Foundation that translated theory into concrete policy. Heritage targeted nine nations for regime change: Afghanistan, Angola, Cambodia, Ethiopia, Iran, Laos, Libya, Nicaragua, and Vietnam".