The Wall Street Journal has published several Open Borders editorials over the years. If any of them could be singled out as the low point, it might be the June 17, 2004 editorial "Borderline Republicans" which more or less endorsed U.S. Rep. Chris Cannon (R-UT). This was two days after the Deseret News published "Illegal plea for illegals' cash?" ("As Rep. Chris Cannon sat by, one of his aides urged any illegal aliens listening to a Spanish-language radio talk show to funnel money into his campaign by giving it to U.S. citizens who could donate it legally...") That editorial is also discussed in "Post-Americans". More on Cannon starting here.

Perhaps for some balance, or (much less likely) as indication of a sea change, today's WSJ has a guest editorial from Leo W. Banks entitled "Minutemen Are People, Too":

...In the view of most of the reporters who parachuted into Arizona for this story and, disturbingly, local ones as well, you'd get the distinct impression that the Minutemen are the problem along the border. That's right. America needn't worry about the thousands who bust into the country every night. No, the real danger are those yahoos who think calling the cops when they see somebody breaking the law is a good idea...

...But you haven't heard much about [crime problems on the border, large numbers of border crossers, etc.] nationally, because the media soft-pedal them. Why? It's politically incorrect. We've built a new third rail in American life. Leave the harmless illegals alone and go after their victims instead...

...It used to be that one or two [crossers] would ask a local resident for water and a sandwich, and, once fed, be on their way with a polite "Gracias, Señorita." The new breed now comes in groups of 50. They demand to be driven to their pickup spot, and if you refuse they flip you off. Sometimes they poison barking ranch dogs or cut their throats to quiet them. How long do you suppose such outrages would go on in Fairfield, Conn.? Or Greenwich? It'd be a day and a half before some kumbaya-liberal flipped sides and founded the Merritt Parkway Minutemen. Or the BlackBerry Brigade...