Translation of tenderloin in German

There are about fifty families who are having very tight connections. Too tight in my opinion. It's like a small town in this aspect. Joanna though is very satisfied with the place and the atmosphere.
They are not used to live together with other religions and cultures and they do not know how to coexist. In each region people assume things about others, but in some regions the hatred grows.
Luckily for him, his wife stood by him and explained that he was clumsy and that would happen to him all the time. Anyway, it none of our business. We all had dinner afterwards and went to sleep.