Translation of Wankelmut

I do not know what to write about Belgium, so that I will write about Greece because my mother is from Athens and i have a lot of cousins there and a lot of other relatives. That is right.
But we need to asked ourselves why we actually are built in such a way that we so easily dislike others and build stereotypes. What leads to such behavior even in well educated individuals?
As soon as I went to bed, incredibly loud music starting playing from right beneath my room. The music was so loud that I could not fall asleep despite my jet lag and despite being extremely tired.