Translation of beachtlich

He also told me that he had build his scooter by himself. I could not understand how a doctor was able to build such a machine on his own. It seems that the circumstances made people capable of many things.
I do not mean to claim that they ought forget their own history, but I assert that they should forgive, not to the culprits who made the rage (that would not be possible), but the next innocent generation.
We left and went back to the boat which took us back to the big vessel. We started our journey back to the main land. It was already late and from the main land, it was still a four hour drive back.