The spate in terrorist activity, against the West by Al Qaeda, is fueled in part by their disillusionment and anger with the Obama Administration engaging more troops in Afghanistan.
When Obama swept into office, he did so with the promise he would end the wars in Afghanistan and Iraq. Then, he did an about face in office, recently stating he is committing 30,000 more troops to the ongoing endeavor in Afghanistan. This has stirred up a hornet's nest in the Middle East, already plagued by terrorist violence.