Answer:
They want Arab countries to reject Western values and punish America for supporting Israel
Step-by-step explanation:
The Islamic extremists have been in constant conflict with the USA for quite some time now. The main reasons for this is that they want to stop any Western values from reaching and influencing their societies, and also to punish America for its support for Israel. Israel is seem as the main enemy and it is the most hated country by pretty much all Muslim nations, especially the ones from the Middle East and North Africa, so the American support for this nation is seen as support for their biggest enemy. Because of this, there has been thousands of terrorist attacks, as well as wars that lasted for years, and the majority of the people that suffered on both sides were of course the innocent people that have nothing to do with it.