Translation of differenzieren

Although I put my wallet in the front pocket of my pants it was not there. I had been so diverted by the aggressiveness of these kids that I did not feel it when they grabbed it out of my pocket.
We begin to think about the information that we receive and we might fabricate our own wrong perceptions about others unless we are willing to become more familiar with these topics by investigating further.
I called the Hilton hotel in Cuba and asked them whether it was worth coming or if they suggest to postpone the arrival. Their response was clear: Don't come unless you really have too.