Translation of Schwarzmarkt

The mothers of my girlfriends were so insulted when I never wanted to eat their food. I mean, in the beginning they liked me, but once the saw my eating habits everything changed. I guess I blew it.
I would like to mention the conflict on the balkan, which has been going on for centuries. Both fought for religion and for land. During the fighting the hatred grew and stereotypes were built.
The same day that I gave my last presentation about our pilot project I flew away. The first lag was NYC's airport John F. Kennedy. I left Europe after midnight and arrived there at five o'clock, more or less.