You’d have to say which NATO. Czechia is in NATO and was in Warsaw pact.
If you said: Americans usually incorrectly think of Western Europe as those countries not partially or fully under control of the Soviet Union during the Cold War, then I’d agree with you.
If you said: Americans usually incorrectly think of Western Europe as those countries not partially or fully under control of the Soviet Union during the Cold War, then I’d agree with you.