Not portraying a script idea that was not established in any way in the first three films (including Cameron's two) is not "bungling" anything.
Well, that's just, like, your
opinio- hold up, I've got a phone call. Hello? Oh, hi, Jimbo, what's up? Tell
Locutus they bungled the future war thing? You got it, homie. Yeah, see you tomorrow.
You're absolutely right. You are most assuredly entitled to your illogical opinion that completely disregards what was shown in all three preceding films and in the TV series which was airing over a year before
Salvation came out.
What are the three Tech-Com soldier's names we know from
Terminator? They're names like Reese, Connor, and Perry (Reese's previous commander). The text on their command datalink is in English. They all speak English with American accents. If Cameron was so determined to depict the Resistance in LA as being primarily made up of South Americans, why wouldn't he throw in some Spanish or Portuguese or some South American accents? Because it was a dropped element from the script that never made it to film, which is precisely why it's not a "bungle" three films and a TV show later when they don't depict something that never happened.
http://www.youtube.com/watch?v=P7nq-r7QWW0
In
T3, the leaders of Connor's Resistance cell are a bunch of kids growing up around LA like him, which the T-X is sent to assassinate. His second in command and wife (also in
T4) is from SoCal. Where are all the South Americans?
In
The Sarah Connor Chronicles, we learn about a bunch of new Resistance soldiers, most of whom are from the US with the exception of an Australian who was sent here and decided to stay and help. Where are all the South Americans?
There very well could be a bunch of South Americans running around in the background not saying a word and being excluded from command positions by their Norteamericano leaders who have it in for them for some reason, but if it's never established onscreen and if after a certain point drastically changing everything would stand out from the previous films, it becomes rather silly to ONLY criticize the film you dislike the most for not following some minor bit of unused trivia from the original script. And believe me, you can have perfectly valid reasons for disliking
T4 the most; this just isn't one of them, because it doesn't make any sense.
In all seriousness, though, as
Cracked has recently pointed out, in a way it's sort of impossible
not to bungle the whole future war thing, as the question of where the machines come from has no good answer.
In the
T3 deleted scenes they were starting mass production on prototype humanoid Terminators, so I would imagine SkyNet would use a combination of human slave labor and humanoid Terminators to start construction of factory facilities for more HKs and Terminators. In the TV show we also saw that SkyNet had been sending back Terminators to secure hidden bunkers where it was stockpiling raw materials for post-war Terminator production, so presumably it did the same with construction facilities. Once everything becomes a self-fulfilling loop SkyNet need only send back Terminators and human collaborators from the future to get the ball rolling on taking over the past, which is what we see in
TSCC.