So you decided to take out your semi professional camera in a movie theatre just to review some pictures and see how it performs in low light.
Were you really surprised when a manager came along and asked you to leave? When you decided your right was to stay and refused to relinquish your memory card or let them look at your camera and they stopped the movie, you just ruined a night out for everyone else in the theatre.
You said you weren't filming and they have to right to ask you to leave and the started making comments on how stupid the theater employees must be to not recognize your right as a proefssional photographer. Well, you were directing your anger at the wrong person... you're the idiot here. — No pictures please