European Jews (Ashkenazi) carry, at most, perhaps 30% ancestry originating from the Middle East– and that is remote. Genetically, they are predominantly European. Their Jewish identity is derived far more from “mutable” characteristics (belief, culture, tradition, etc,) than from “immutable” ethnic/genetic distinctions. Does that delegitimize their identity as Jews? Of course not. Does that make anti-Jewish hate speech less offensive? Of course not.
Identities based on elements that could be hidden or abandoned to avoid harassment, are not less valid than identities based on characteristics that cannot be hidden or abandoned. Indeed, the suggestion that it is acceptable to coerce people to discard the convictions of a lifetime in order to “assimilate” — while their beliefs do no harm to anyone, but only make them different from the majority — is hardly consistent with Enlightenment values. Again, this is not an argument for expanding restrictions on speech; it is an argument for eliminating restrictions.