And people wonder why ordinary Mexicans are trying to get the hell out of that benighted country by any means necessary.
Maybe after November Congress will have the guts to take meaningful action on armed incursions like those you mention.
Anyway, the Mexican Army escorting drug smugglers has nothing to do with "honest" illegal aliens coming north. Most illegal aliens are gang members, criminals of all types and drug smugglers.
The romantic notion that there are hordes of hard-working illegals striving for an honest living in America is a myth. Review the linked blotter to get a sample of what actually is coming north (http://www.cbp.gov/xp/cgov/border_security/border_patrol/weekly_blotter/).
http://www.cbp.gov/xp/cgov/border_security/border_patrol/border_patrol_officer_memorial/