The West needed 30 years to realize that (some are still working on this I think) because it thought that it had actually 'won' the Cold War through it's actions during the Cold War, when the reality was much more likely that the East had collapsed also without much 'help' from the West.
The countries on the 'losing side' in this battle of ideologies (like the Soviet Union and China) had adapted to this new reality much more quickly, both in different ways though, but none of them copied the 'obviously superior' model of the Free West.
Of course hindsight is 20/20, but sometimes I've got the impression that many people in the West still wear their rose-tinted Cold War glasses ;)
It's perhaps easy to forget now, but during the 30s, 40s, and 50s the face and "leader" of communism was Stalin – not exactly a friendly chap – and things like China's Great Leap Forward left over 20 million dead (mostly due to incompetence, not malice), and let's not forget Cambodia.
Details differ per care of course, but in quite a few cases all of this was done in the name of "freedom and democracy", which was perhaps not entirely unreasonable too. I'm not saying that it was the right thing to do (many other issues like national sovereignty etc. which come in to play), but I do think it's a bit more complex than your comment. I'm not sure if idly sitting by and doing nothing would have been that great of an option either.
There's a reason that communist symbolism and the like is considered taboo in many formerly communist Eastern European countries, somewhat akin to Nazi symbolism.