It’s interesting you mentioned this because even the most reformed Jewish congregations still read the Torah in Hebrew, not the vernacular (as far as I know). Why wouldn’t we make sure we keep Latin in the Mass at least in some parts?
Your example is not a very good one.
So far as I remember, the Torah has been in Hebrew from time immemorial. Sure, there was a translation into Greek (the Septuagint), but it wasn’t used for services.
Christianity probably started out in Aramaic or Greek, and Jesus himself most likely did not speak Latin (if any, it would have been some vulgar/trade Latin). The New Testament was itself written in
Koine Greek (what did you think Paul wrote in?). That’s important, because Koine was the
common Greek (as opposed to Attic Greek) which was spoken by the people.
It was only at a later time, when Latin was the
lingua franca, that all things ended up in Latin. So to say that Latin was “from the beginning” is itself an appeal to a history that never happened.
So you see, although you might see a parallell, it simply does not exist. There’s also the fact that the Eastern Christian churches have never used Latin, so in the wider Christian context you can’t appeal to Latin as “the language for Christians” or as a “sacred” language.
That really only leaves you a cultural argument, and the influence of the “Latin West” is really dead. The biggest influence of contemporary times (in the western world) was the British (notice how this here forum is in english) and in Northern (non-Nordic) Europe it was Germany. Latin hasn’t even been used academically in the majority (in the West) is some 200 years. I’m sorry, but Latin is no longer part of our culture (except as a small influence on our language, and even then it has to compete with the German and French influences, which are much greater).