An equivilant to Arab Nationalists? That might be tricky. Are we talking about a group wanting political union or for alliances? Technically Indians were Hindu Baathists, and Indonesia Malayesque ones. Really, Arab is one of the broader labels since it covers areas spanning two continents, with many countries such as Egypt, Syria, Saudi Arabia, Iraq, Morocco, Tunisia(maybe), and Lebanon having thousands of years of history, their own dialects and languages, different religious minorities, plus histories that did not stop with Muhammed and United into some blob, but continued having their own histories, even if the importance of their areas waned at times. Latin America under the Condor Pact might count as Baathist (depending on if you are going by the first Baathists, or the Neo-Baathism of Assad and Saddam), though after independence from Spain many of the countries broke up into regions, going against any Bolivarian state. Too much difference between econonomies, histories, political structures, racial makeup, dialects, histories from before the Spanish speakers.... Actually, that is kind of like how the various Arab unions kept breaking up.