Why Is Bush Helping Saudi Arabia Build Nukes?

In the WSJ, here

"....Saudi Arabia's interest in nuclear technology can only be explained by the dangerous politics of the Middle East. Saudi Arabia, a champion and kingpin of the Sunni Arab world, is deeply threatened by the rise of Shiite-ruled Iran......The two countries watch each other warily over the waters of the Persian Gulf, buying arms and waging war by proxy in Lebanon and Iraq. An Iranian nuclear weapon would radically alter the region's balance of power, and could prove to be the match that lights the tinderbox. By signing this agreement with the U.S., Saudi Arabia is warning Iran that two can play the nuclear game..."