for a Jewish person to chose a Jewish person is not only completely OK, it is the only thing to do. "Racism" is only wrong if you harm someone who is innocent. If you have to chose, it always involving saying no to inappropriate people. And if you are under the influence of the religious sentiment, saying no to someone inappropriate is not only completely OK, is there any other solution?

People raising the cry of "racism" are just antisemites (or self hating Jews) who feel existentially threatened by the idea of Jews reproducing within the tribe. The same type of people now crying "racism" are the ones who collaborated with Nazis 70 years ago, things don't change that much.

In fact, in the novel, Harlyn was frightened off by all these medical histories. From a medical point of view this information is largely junk. Most of the things related are not genetically associated, just there to go through the notions of filling long questionnaires.