What is really indicative about this case is the lack of measuredness with which these people are being treated.
People have mixups with their visas and the conditions of their visas all the time, all over the world. Detaining someone for over 2 weeks, chaining them like a criminal, and holding them incommunicado - so that their family doesn’t even know if they’re on the plane out… is the most obscene over-reaction.
It tells you that terror and cruelty IS the objective. https://www.bbc.com/news/articles/cly67j35y99o