Translation of Stütze

I mean every thief becomes excited if he sees such a stupid tourist as I was. Some little children, I think that they were from xyz origin, came to me and offered me a newspaper and asked for money.
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?
I boarded the AA flight to Cancun, and got there around two o'clock. It was my first time in Mexico. On the same night I had a flight booked to Havana, but I did not know whether I should take it.