Where does the article show a "disdain for the rule of law"?  It shows the author's disagreement with a particular law.  
Regarding enforcement of laws:  when domestic violence laws are enforced more vigorously; when tax laws are enforced more thoroughly; when USDA laws are enforced as should be; when the many laws that are routinely unenforced or under enforced are enforced with regularity, then I will be able to take more seriously the call for vigorous enforcement of the laws that are designed to marginalize immigrants and to make their lives difficult.  Until then, I find the claims of a "disdain for the rule of law" to ring more than a bit hollow.
The clear fact is that the current immigration law is broken; it does not meet the needs of US citizens or of US business; and it is, in many respects counter-productive and inhumane.  Instead of issuing calls to respect the rule of law, it would be more helpful to push for a reform of the current immigration law.