Translation of sabotieren

I hope you could understand my last letter to you. You see, when I write in Spanish I am not very confident. I always question myself and each and every sentence takes about fifteen minutes.
Unfortunately, it is a natural and eternal phenomenon of human beings. Whereever people have been, it appeared too. Please let me define racism in my next email to you and please share also your thoughts.
The next day it we had another hike, this time much further away, but luckily downhill. We again walked through various rice fields and rice terraces, along rivers and through hill tribe villages.