Guantamo is an
American policy, but how many times have they been attacked since 2001? None. But we're talking about "the West" - UK, France, Malta, Canada, etc. For example,
this article, from the end of 2002 says that altho Arab opinion is extremely anti-America, it is also highly respectful of France and Canada - both of whom took a major role in the Afghanistan war. US (and perceived UK) support for Israel is the main reason for negative attitudes towards these countries (plus presently the Iraq war also).
I don't think you're very accurate to say the Afghan war "turned Arab opinion against the West" because opinion polls show that three of the main NATO nations taking part in major operations in Afghanistan are ranked in the top 5 favourite countries in the list given to them by the opinion poll (Germany, France, Canada).
I'm not even sure how much effect Guantanamo has had on Arab opinion towards America, let alone the West. America has always been looked on unfavourably by the Muslim world because of Israel, are you really trying to tell me that Guantanamo and Afghanistan
specifically have had much baring on that attitude when it hasn't effected opinion on any other country operating there?