I am sorry, jugoth, but I do not understand fully your quite peculiar language. I have studied English at school and I use for my job but some colorful expressions are a bit hard to understand for me.

Anyway...

1. BSG is filmed mostly in Vancouver, Canada, so they do not fight "in american streets". The location seems anonymous enough for the casual, or international, viewer. They could be streets of London, Milan, or Tokyo.

2. The Twelve Colonies are (or were) inhabithed by people of different ethnicity. Battlestar Wiki hosts many topics about their various cultures, and it is very informative: have a look at it. Outscreen, this is reflected by the international cast: Edward James Olmos is Mexican/American, James Callis is British, Grace Park is of Korean descent, Kandyse McClure is from South Africa, and so on.

3. BSG is a sci-fi show and makes no references to the actual politic situation of the real world, so in my opinion your references about it are a bit forced. If and when Earth will be actually found, we'll see how it will be depicted.

4. Of course, they all speak and write English in the show . There is a good "inscreen" explaination, obviously, but the natural reason is that this way the audience can understand what is happening. Seems quite logical to me.

5. So say we all.

Giorgio

giorgio_2004 here, ksabers on XBox Live, PSN  and everywhere else.