Yeah, once the plane has been diverted, everyone has been evacuated etc, the incentive to find something "bad" he might have done to justify the disruption & the expense is serious.

Will this cause anyone to critically examine the actions of the passenger, the flight crew, and JTTF?

Likely not.

Because once person A points a finger in the direction of person B, everyone's incentive is to make sure they are not the one who allowed the "terrorist" to go free.

Easily avoidable false positives like this are security failures. They slowly erode trust instead of allowing a literal big bang demonstration of the failure and therefore they are insidious.