Well, for one, I'm not sure that the "White Terror" of 1941-44, in which 2 million Black Africans, North Africans, and Roma were either deported or thrown into prison camps(of which 400,000 were executed as "enemies of the King"), would have ever happened; remember, Genseric I(or Geserique, the Teuton Usurper as many Frenchmen call him) was King at the time(enthroned in 1937 after the *highly* suspicious death of Francois IV-many in France still believe he was murdered.), and from one of the Holy German Imperial families at that-sadly, a good few of them(though perhaps not a majority) were at the forefront of the promotion of scientific racism during the first several decades of this century(and by 1930, those that actively and openly challenged it were sometimes exiled, usually to Great Britain; Sophie Augustine of Hesse, one of the greatest British biological scientists of this era, was one of these unlucky souls.). And Genseric himself had been the victim of an assassination attempt by a Romani woman in 1933 while he was visiting Mexico(Angelica Castro, the assassin in question, was a citizen of Pacifica at the time, but she had relatives in Mexico City and a few other places in Mexico, as well as San Antonio, Texas, were her brother Roberto fled after the Mexican Imperial authorities tried to arrest her) .
What's rather sad about this, by the way, is that the Roma were well on their way to becoming fully assimilated into French society, thanks to the Reforme Bernouilliste in 1893, until the time of Genseric's rise, as were a good number of the North Africans. Truth is, IOTL, too many Frenchmen at that time respected the King and dared not go against the monarchy until it was too late. Of course, that's changed now, and certainly, the French learned their lesson quite well, but, still, perhaps if the monarchy had ended earlier, the "White Terror" might never have happened, as it would have been much harder to do under a Republican system(the Syrians attempted a similar stunt with their Lebanese minority in the '80s; it did not end well for the Abubaker regime at all.).
Compared to the "White Terror", what the original Revolutionaries did, although still terrible, was mere peanuts, as the "White Terror" was nothing less than a massive campaign of violent oppression and state sponsored ethnic cleansing.
OOC: Okay, well, to be honest, I really did feel that there was too nice of a picture being painted of Monarchist France, so I decided to counter that. Now, granted, Genseric's regime isn't quite comparable to, say, the Nazis, but still pretty awful(think: monarchist Pol Pot with fewer deaths and with far less agricultural destruction, and with elements of Mussolini.). And, unfortunately, perhaps not quite as unlikely as we might think. The good news is, though, France ITTL has made amends just like the post-fascist German governments did IOTL.
Also, Pacifica is California + everything west of the Rocky Mountain watersheds + the Rio Grande down to *Arizona, and minus those parts in the United States(which I assume includes the Oregon Country as well). Texas, also a republican state, is basically everything the OTL Republic of Texas claimed minus anything north of the 37th parallel. Pacifica is neutral, but Texas was an enemy of Imperial Mexico up until the 1960s, with the Treaty of Austin in 1962.