What do you make of the angle that bringing international news coverage and a response from Homeland Security within a day or so was the level of platform size/privilege/success that offsets the legal liability he opened himself up to? Additionally, if this had progressed to a longer-term detainment or worse, would being a relatively public figure as a political prisoner offer any justification for the risk taken?
I certainly don't believe that the state of affairs where CBP acts with such impunity is a good one, so I wonder at what point does a public figure taking a risk that ought not be a risk (that police routinely go on such fishing expeditions hoping to find something remotely actionable is the problem, in my view) is a worthwhile use of their fame and popularity?
I can't speak for the people with the power to actually make this policy, but for the people I know who have been big believers in this, it's because this is the part of the Bible they actually like: Jesus coming down from Heaven with sword in hand to destroy all the wrongdoers (read: people the believers don't like). They have absolutely massive amounts of Christian fanfiction devoted to how they want all this to go down (see: The Left Behind series). This is their superhero power fantasy type beliefs.