CoL49 (6) Their Entire Emphasis

[Dave Monroe]

  "Less excited than she might have been even a week ago, Oedipa
showed the piece to Emory Bortz. 'All the Tristero refugees from the
1849 reaction arrive in America,' it seemed to him, 'full of high
hopes. Only what do they find?' Not really asking; it was part of his
game. 'Trouble.' Around 1845 the U. S. government had carried out a
great postal reform, cutting their rates, putting most independent
mail routes out of business. By the '70's and '80's, any independent
carrier that tried to compete with the government was immediately
squashed. 1849-50 was no time for any immigrating Tristero to get
ideas about picking up where they'd left off back in Europe.
    "'So they simply stay on,' Bortz said, 'in the context of
conspiracy. Other immigrants come to America looking for freedom from
tyranny, acceptance by the culture, assimilation into it, this melting
pot. Civil War comes along, most of them, being liberals, sign up to
fight to preserve the Union. But clearly not the Tristero. All they've
done is to change oppositions. By 1861 they're well established, not
about to be suppressed. While the Pony Express is defying deserts,
savages and sidewinders, Tristero's giving its employees crash courses
in Siouan and Athapascan dialects. Disguised as Indians their
messengers mosey westward. Reach the Coast every time, zero attrition
rate, not a scratch on them. Their entire emphasis now toward silence,
impersonation, opposition masquerading as allegiance.'" (Lot 49, Ch.
6, pp. 173)

http://www.nbu.bg/webs/amb/american/6/pynchon/lot6.htm
http://www.innternet.de/~peter.patti/thomaspynchon-thecryingoflot49.htm

What is the sine qua non of the Tristero?  Disinheritance?  Are they
"sympathetic"?  Always?  Can such "changed oppositions" be mapped
somehow onto history?  politics?  American?  European?  Help!