Mr. Rosales' syllogism supporting lifelines across the All- American Canal is a flawed construct. The fallacy of its major premise, the role of the U.S. Border Patrol, should have been obvious to everyone (well, maybe not to Christine) who read it.
The USBP's reason for being is not to save American lives or foreigners' or even those of aliens from another planet. The fact that USBP agents sometimes do (excluding extraterrestrials, so far), often at personal risk to themselves, is incidental to their law enforcement duties. Anthropomorphically (sorry Christine) speaking, the "life" they are sworn to protect, unconditionally, is that of the international boundary.
Inductive reasoning, starting with random acts of humanitarianism on the part of individual agents, does not support the conclusion reached by Mr. Rosales that the primary mission of the USBP is to serve as lifeguards for smugglers, illegal immigrants and native-born or naturalized morons who ignore good advice from Dippy Duck.