Are the people in the audience sadists for laughing at the mother?

keeping in mind that the people in the audience did not know anything about the conflicts in Spanky's home, the grandmother and Spanky's mother, and the M.C. and the mother, HENCE they would not be able to formulate an opinion as to her being a bad person, or pushy stage mother, I ask the question:

" Are the people in the audience sadists for laughing at the mother? "

I further ask, " Why were there no chivalrous gentlemen in the audience to offer her a suit jacket or an over coat?

I for one would have given her my overcoat to cover her, so as to avoid the embarrassment and public humiliation and shame which went with it.