I'm curious why you think the East German and US situations during the Cold War were all so different from the perspective of what the comparison was talking about.
With the Red Scare (which started decades before the Cold War), the government was involved early on, and at a high level. See http://en.wikipedia.org/wiki/First_Red_Scare for some of the details of what happened in the 1920s. Senator McCarthy of course used the bully pulpit to push anti-communist policies. The House Un-American Activities Committee played a key role in starting the Hollywood blacklist.
Of course there were certainly non-government pressures as well. People were anti-bolshevik and worried that the US would be overthrown just like Russia was. Others saw anti-Communism as a way to frighten people, and use that freight as a way to gain power. But without the government we wouldn't have had laws like the Taft–Hartley Act, which for 18 years prohibited union leaders from being members of the Communist Party. The Communist Control Act of 1954 is still on the books.
With Eich there's absolutely no government involvement, and the opposition is based on the right of association. Some Mozilla employees, some volunteers, some citizens, and some organizations don't want to associate themselves with Mozilla.
With East Germany, the police wanted to be involved in the actions of dissenters, and had the power to do so. With the Red Scares, the US government also used their power to force others to not associate with Communists. But with Eich .. what power do the dissenters have other than their right of free association?
