Translation of desillusionieren

So, I have to say that the behavior of the people living in Turkey is very different from most countries in the world. They are very open, kind and funny, sometimes one can think that they are rude.
I would like to mention the conflict on the balkan, which has been going on for centuries. Both fought for religion and for land. During the fighting the hatred grew and stereotypes were built.
Not worth mentioning. The next day we spent the entire day in the mall buying unuseful things, cheap Jeans of poor quality and again gifts for our friends. I remember buying swimming pants in the sports store.