In the first class there was Robot-as-Menace. I don't have to explain that overmuch. Such stories were a mixture of "clank-clank" and "aarghh" and "There are some things man was not meant to know." After a while they palled dreadfully and I couldn't stand them.
"One of the best parts of this episode was Professor X’s explanation of the Sentinels as being the enemies that bothered him the most, because they were the one foe whose mind he could never change. I’ve always loved the Sentinels (giant racist robots getting killed is always rad), but I’d never thought of it that way — that they’re hardwired to hate, and that the X-Men can convince people to give up on bigotry and hatred, but they can never reprogram robots."