Why is it bad rhetoric to insult one's opponent instead of responding to a valid point

What evidence from the radio broadcast the war of the worlds supports theme that human vanity can cause problems

The english language has the largest vocabulary of any language in existence. it has close to a million words! the english language is also the most widely used language in the world. close to a billion speakers, at least half of which speak english as a second or foreign language. this unit takes you on a brief tour of the history of english, showing you how the language moved from its obscure beginnings to its celebrated status as the first truly global language. what is the main idea in the text?

Read the following excerpt from life on the mississippi by mark twain. no girl could withstand his charms. he "cut out" every boy in the village. when his boat blew up at last, it diffused a tranquil contentment among us such as we had not known for months. but when he came home the next week, alive, renowned, and appeared in church all battered up and bandaged, a shining hero, stared at and wondered over by everybody, it seemed to us that the partiality of providence for an undeserving reptile had reached a point where it was open to criticism. how does twain's use of understatement serve his purpose? be sure to use specific details from the text to support your answer.