You're spot on, lest anybody think my last post is a United supporter. After they way they handled CLE they can shrivel up and die for all I care. But I do think it's important to separate what United did from what law enforcement did.
A "retard" is a member of a protected class and cannot be fired on account of his or her disability. In fact, he or she must be reasonably accommodated.
Now, none of us were there, but I doubt that United called law enforcement to forcibly remove him from the flight. It did not go down like my favorite scene from Casino (feet off the table). They may have called to have him removed, but the decision to use force was made by the officers, not United, based on the person's actions.
One thing worth pointing out, people may say what the hell, he was just refusing to give up his seat, and yes that's true. However, in an emergency situation passengers are expected to comply with all crew member instructions, and the law requires that they do so. You've now got actual knowledge of a particular passenger who has no qualms deciding which crew member instructions he will follow and which he will disregard. For the safety of everybody else on that plane the airline can't ignore that.
Of course not, don't be ridiculous. The provision is you leave when told or you are trespassing, which is a criminal offense that will lead to law enforcement getting involved. Once the referral is made to law enforcement, United has no control over how it is carried out. And by the way, in the case of a passenger refusing to leave the plane, the airline has no option other than to call law enforcement because no, they're NOT allowed to knock passengers out cold.
Was it a shitty business decision on their part to bump people? Yeah I tend to think so, but at the end of the day when someone refuses to leave the plane the cops are going to get called, and it's going to go wherever it goes from there.