However, audience members are not unanimous in supporting the show. Some adults think the cartoon's content, including the horrible death of the impoverished character "Kenny" each week and the nonstop raunchy jokes, is inappropriate for youngsters.

* "Audience are" is correct here because they are not acting in a unified way -- they disagree. But that sounds awful, so I'd add the word "members." Or you could go with "viewers" again here.

* I'd say no commas setting off "Kenny" ... but it depends on whether you think the words "the impoverished character" identity him well enough that his name is non-essential to understanding the meaning. If you do, put a comma after "character" and another one after "Kenny" but inside the quotation mark.

And do you need the quotation marks? Again, it's a bit of a judgment call, but they add some clarity, so let's keep them for now ...

* My dictionary says "nonstop" is one word with no hyphen.

* Ignore everything that is set off by commas after the subject of the clause ("content"). No matter how many words there are, they don't change the fact that the subject here is singular.