This is more of a "would we be the assholes?" situation, since it involves all of my classmates. Thanks in advance and also sorry for my English.

Yesterday (Thursday) our professor said that today (friday) he wouldn't be able to come to class and naturally we were all excited because we really dislike him and being with him for three hours is a nightmare, anyway, naturally we respectively all planned something for our Friday evening.

Literally 20 minutes ago he send some lectures for that stated that they were for today's class and we were like "the fruck". He didn't let us know of this change either so pretty much everyone is pissed and nobody really wants to go.

Would we be the assholes if we didn't go to his class? I mean, the guys a pain in the ass, as a person and also as a teacher so we're kinda risking something. :/ Thanks