Actually it is quite a simple analogy, if you are asked to leave, it doesn’t matter why at the time, you are obliged to leave. A taxi driver can evict you from his taxi, just like the airline. The reason doesn’t matter, you can’t refuse to leave.
Ah, but unlike with a taxi, an airline ticket is considered by most passengers to be similar to a binding contract. You bought and paid for your ticket, in return for being taken to your destination. The airline has your money - you have no leverage. Whereas a cab driver gets paid at the end of the fare. Ergo, being asked to leave a plane w/o sufficiently plausible reasoning justifiably raises a customer’s ire - they are not receiving the services for which they have already shelled out money.
Certainly an airline could forcibly remove a passenger who poses an imminent threat to interfere with the flight. Based on what has been reported thus far, that does not appear to be the case here
In today’s America I suppose that doesn’t matter.
They also should have shot whomever it was that shot the cellphone video of the incident. That video harmed the airline, and that person deserved to be executed on the spot for doing that.