It's against the law to encourage, aid, or abet aliens to illegally enter the United States: https://www.law.cornell.edu/uscode/text/8/1324
Both citations seem equally relevant to the article.
If you think your legal citation is meaningful, then I'll point out that 1) the described (and alleged) retaliatory behavior are not listed as any of the punishments in the text you quoted, 2) punishment without being able to challenge the punishment is an abuse of power, and 3) why aren't the lawyers and activists simply arrested for breaking the law?