Should I not have talked loudly during the movie I was watching at the crowded movie theater?
No, you really shouldn't do such a rude thing. Why would you let others know what's on your mind while watching?
I guess I was too concentrated on the movie, I couldn't help myself.
You were focused greatly on what you are watching at the theatre, but talking so loudly and for so long is distressing for other viewers. Gain some perspective on what others see and think while you watch, and maybe you will understand how they feel. The world doesn't revolve around you.
So you think the world is against me?
I understand you were quite enveloped in your experience, but try to pay attention to what is happening around you. Make sure you are courteous to others and don't annoy them by talking loudly in a theatre. People are there to listen to the movie, not you.