This part is all true: So, US immigration has put up fences all over hell and creation between the US//Mexico border. Sewer systems between the two halves of border towns are, of course, unguarded and unsealed for all the obvious reasons. Poor boarder patrol officers have to muck threw the sewers looking for illegal border crossers. A Catholic Death cult, Santa Muerte, worshiping the White Sister, Death, has also popped up all over border towns. Low level members of drug cartels are the primary members, and there have even been rallies to permit drug dealing by death cult members on grounds of religious freedom. Gay Mexicans, drag queens in particular, have joined these cults having been excluded from traditional churches. They have found that the cults are much less judgmental (i.e. not at all,) and thereby the only place they are welcome to express their faith and sexuality at once. The queens mule meth and coke from time to time as well.
This part is and fake and maybe irreverent: If this isn't a playground for a vampire game, I don't know what is. Nosferatu find immigrants and police invading their domain, the death cults could be anything, but I vote for La Raza anarchs.