That is the traditional chrstian position. However, it works only if chrstianity is true. This is an untested assumption for most chrstians who believe what they do because their "bible" or their church tell them to.
There is no Temple, no Sanhedrin,
There are sanhedria (battei din) all over the world, though Judaism is very fractured at present. The Beit Din HaGadol (Great Sanhedrion) will be restored in the future.
no unity in worship,
It takes some 'ovnayim for any chrstian to accuse another religion of not having "unity in worship!" So . . . are you Catholic or "church of chr*st?"
they are not traceable to the 12 tribes,
So who are they traceable from? The "Khazars," I suppose?
I find that most chrstians who maintain that the Jews can't trace their ancestry back to the Twelve Tribes are the same people who claim every Jew is lineally descended from the "evil" Jews of the "new testament" and are therefore guilty of "deicide."
no identity I can see as a people of G-d.
You hold this opinion because of your dogmatic beliefs. Your dogmatic beliefs are not necessarily true.
Still, it is amazing that they exist at all.
I'm sure it's all just a big, meaningless coincidence. Y'know, like the existence of the universe and everything.
“I’m sure it’s all just a big, meaningless coincidence.”
I don’t think he meant it was a coincidence, more like it was somewhat miraculous that the Jewish people had survived so long without a homeland, since very few other nations survived in such a position.