The latest anti-regime protests in Iran look like a major political event, and judging by its vigorous and violent response the regime agrees. Now is a moment for the political left and right in the U.S. and Europe to unite in support of the Iranian people.

The protests erupted in several cities across the country in response to government increases of 50% in fuel prices. The increase raises the price of a liter of gasoline to only about 35 cents. But the reaction to the increase reveals the desperation and anger of Iranians...