If you leave out the genetics entirely, you say pretty much the same thing. "Askhenazi Jews are population half- Romans from Italy" and "I would choose Askhenazi Jewish actors to play the Romans because of their shocking similar facial features to ancient Romans."Yiddish was born originally a a neo Romance language. Askhenazi Jews are population genetically speaking half- Romans from Italy. Later they moved to the land of Franks than to Germans, their language and vocablary switched from neo-Latin to a rather Germanic language.
There are many evil false sterotypes about Jewish anthropological look since the emergence of anti-semitism (and especially nazis in Germany), but to tell the truth, If I want to depict Early Roman Empire or the Republican era Roman soldiers, I would choose Askhenazi Jewish actors to play the Romans, not only because of their very similar Roman-like genetics, but their shocking similar facial features to ancient Romans.
Can you prove either statement without genetics or DNA evidence? If not, you might be better off saying nothing at all.