Translation of Onager

We drove towards the university where he studied and from there we drove to the hospital where he worked. He told me that there were hospitals for locals and for foreigners with different medical equipment and staff.
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?
We walked by waterfalls and rivers, but the water was too cold to swimm in. The hike made us tired and we were in the valley, which meant that we had to climb up again. The climb was difficult.