Good, thoughtful dialogue is important regarding prejudice, racial, national or otherwise. Having the dialogue can get us to think about it and try to figure out what we can do to make the situation better. Human nature would indicate that no matter what prejudice, racism are around for good. (I do not see it disapearing) Yet by making it an issue we as people can hopefully learn from it.
Now Madonnas concert performance and speech brought some awareness to this and really is that a bad thing? Maybe some action can be taken to create a better situation!
All Madonna has done is stir things up, the real help is already being done, if you look at the website I posted the link to (funded by the EU) you'll see that various organisations and groups have been working on this for a while now, it would have been better if she had publicised that rather than speak from ignorance.