If we're going to speculate, let's go ahead and flip the hypothetical. So you're on the plane with your kid, and a passenger freaks out because they overheard a scrap of a conversation in a language they don't speak.

Security takes that very seriously, so of course they get everyone off the plane. You, along with every other passenger, are separately questioned about your activities, politics, and religious beliefs. Your carry on and checked luggage are both searched carefully. Your kid is interrogated to make sure that you're not lying about being their guardian, and that your stories add up.

Of course, they find nothing. There are no terrorists on the plane (although a couple of teenagers are arrested for failing a breathalyzer test). But out of an abundance of caution, the airline elects to cancel the flight, and bar you all from further travel with them for 24 hours. You're refunded your original ticket price, of course, with no hard feelings!

Does that still seem like a reasonable response to you? Or is it only when you're not subject to it that draconian security measures are an appropriate way to deal with a ludicrous imagined threat?