Rebbie Yussel:
Seforim too numerous to mention specify and outline the gravity of this sin. Sorry it’s not the end of the world to you. ?????? etc. is not by every other aveira. I’m not so knowledgeable in Halacha and Talmud, I’ll just suppose it’s a real grave offense.
And you’re EQUALLY annoyed by another person’s davening!! To you they’re equal? One is talking to his creator, the other is laughing to His face, and to you they’re equal?!?