BEIRUT, Lebanon — President Obama says he is seeking Congressional approval for a “limited, narrow” military strike against Syria — an aim that many Middle East experts fear overlooks the potential to worsen the violence in Syria and intensify a fight for regional influence between Iran and Saudi Arabia.

Supporters of the president’s proposal contend that a limited punitive strike can be carried out without inflaming an already volatile situation. But a number of diplomats and other experts say it fails to adequately plan for a range of unintended consequences, from a surge in anti-Americanism that could bolster Syria’s president, Bashar al-Assad, to a wider regional conflict that could drag in other countries, including Israel and Turkey.

“Our biggest problem is ignorance; we’re pretty ignorant about Syria,” said Ryan C. Crocker, a former ambassador to Syria and Lebanon, who has served in Iraq and Afghanistan and is dean of the Bush School of Government and Public Service, Texas A&M University.

The American strike could hit President Assad’s military without fundamentally changing the dynamic in a stalemated civil war that has already left more than 100,000 people dead. At the same time, few expect that a barrage of cruise missiles would prompt either side to work in earnest for a political settlement. Given that, the skeptics say it may not be worth the risks.

“I don’t see any advantage,” said a Western official who closely observes Syria.

In outlining its plans, the Obama administration has left many questions unanswered. Diplomats familiar with Mr. Assad say there is no way to know how he would respond, and they question what the United States would do if he chose to order a chemical strike or other major retaliation against civilians.