A)
I think we watched the episode because it was really relevant to our topic about racism and prejudices. In the episode is the women convinced that her new neighbour from the Middle-East is a terrorist. The message in this show is that we sholdn't judge people without knowing them. There are millions of foreigners, and less than 1% of them are terrorists.
B)
Using humour is a good way to approach sensitive topics. If we can make comedy out of it, it will make it not as taboo as it might be today. On the other hand you must know who you are talking to. Some people might think it's funny and laugh of it, but other's can feel hurt. They aren't sure if it's only a joke or if the person who says it really means what he/she are saying.
So we need to be sure that they don't feel harassed, but see the funny side of it instead. If more and more people think it's ok to joke about it, then it will take some of the prejudices away.
