if jewish had cursed a particlar gentile lineage ,,is it possible for such gentiles and their next progenitors to be born with worst natal chart aside one's own personal karma?
It is possible that you would only be able to reborn on a worse natal chart depending on how much curses you have that basically became your negative karma.
Basically, you would be able to have kids with any natal chart, but some your personal negative karmas/curses can also pass down to them, that you had in that specific time.