ISLAMABAD -- The latest diplomatic rift between Pakistan and Afghanistan speaks volumes about the underlying frictions among both countries and the United States in the so-called war on terror.

Disagreement centers on Afghan officials' allegations that Pakistan turns a blind eye to the activities of anti-Afghanistan militants. For Pakistan, conflicting messages from the U.S. don't help. The U.S. commends Pakistan for supporting the antiterror campaign while lamenting Pakistan's failure to offer full cooperation. Confusion should come as no surprise.

Afghan leaders, including President Hamid Karzai, are keen to note that Afghanistan's proximity to Pakistan brings it closer to its neighbors. Yet the influence of Karzai's words in Pakistan are limited when followed by skeptical remarks from other Afghan officials.