Based on some reporting, Faisal Shahzad apparently was motivated by U.S. supported attacks on Western Pakistan.

If the reporting is accurate, his failed attempt in Times Square may in some ways echo Fenian Brotherhood attacks. Irish immigrants in the United States raided Canadian targets. The goal was to bring pressure on Britain to withdraw from Ireland.

The attacks

….divided many Catholic Irish-Canadians, many of whom were torn between loyalty to their new home and sympathy for the aims of the Fenians. The Protestant Irish were generally loyal to Britain and fought with the Orange Order against the Fenians. While the U.S. authorities arrested the men and confiscated their arms afterwards, there is speculation that many in government had turned a blind eye to the preparations for the invasion, angered at actions that could be construed as British assistance to the Confederacy during the American Civil War. There were five Fenian raids of note….

From Wikipedia, the Fenian Raids.

As someone who has long opposed U.S. military action in the Middle East, I am not in the least bit surprised that "the chickens have come home to roost."

While I am not optimistic, I pray that both Republicans and Democrats will come to their senses, and move for a rapid and unilateral de-escalation on all fronts.