Qatar announced Wednesday that it was recalling its ambassador to Tehran. It joins Saudi Arabia and a growing number of allied states that have severed or reduced diplomatic and commercial ties with Iran. Ostensibly, the moves are coming in response to the storming of Saudi diplomatic posts in Tehran and Mashhad after the Saudi execution of Shiite Sheikh Nimr al-Nimr. In reality, the splits reflect the belief in the region that Iranian influence is a threat to Sunni Arab states. By itself, Saudi Arabia is no match for the much larger, more populous Iran — and the end of Western sanctions is only boosting Iran's might. For example, the Saudi kingdom has a 200,000-member military versus Iran's 550,000.