Kasmirans are atheists, which would make them a whole race of Silas Marners, not Jews.
As for Cymrilians, they have some high-elfish traits but:
- Are not immortal.
- Are not particularly dextrous.
- Not nature oriented. At all. Actually more like Edwardian England in many respects.
- Not fey.
- Rarely use bows.
- Are not exceptionally beautiful.
But they do practice wizardry, use longswords, and have pointy ears, which makes them pointy-eared Melniboneans. Or tall, green gnomes. Your call. Might as well call them re-skinned humans, right?
So even though many elven archetypes are somewhat represented in Talislanta there are not, actually, elves. You can not point to any race in Talislanta and say, "If you normally play an elf, this is what you should play in Talislanta."