You can't have a "war" on a tactic.

http://www.washingtonpost.com/wp-dyn/content/article/2008/07/29/AR2008072902041.html
The Bush administration's terrorism-fighting strategy has not significantly undermined al-Qaeda's capabilities, according to a major new study that argues the struggle against terrorism is better waged by law enforcement agencies than by armies. The study by the nonpartisan Rand Corp. also contends that the administration committed a fundamental error in portraying the conflict with al-Qaeda as a "war on terrorism." The phrase falsely suggests that there can be a battlefield solution to terrorism, and symbolically conveys warrior status on terrorists, it said. "Terrorists should be perceived and described as criminals, not holy warriors," authors Seth Jones and Martin Libicki write in "How Terrorist Groups End: Lessons for Countering al-Qaeda," a 200-page volume released yesterday. But the authors contend that al-Qaeda has sabotaged itself by creating ever greater numbers of enemies while not broadening its base of support. "Al-Qaeda's probability of success in actually overthrowing any government is close to zero," the report states.