Differing views on September 11

Don Watkins looks at the Libertarian Party's response to the attacks. Most of what he writes is fine, even if I disagree with him overall. One thing I want to point out though is this paragraph:

September 11th was a consequence of American appeasement of radical Islam. Our first rule, therefore, must be to avoid appeasement. Inaction, in other words, is the greatest danger we face.

Are appeasement and inaction synonyms?
Oh well, at least he admits some of our foreign policy has been misguided, and even unjustifiable. Wow, quite the strong statement.