There are the “true Arabs” who are from the arabian peninsula.
And lots of Arabized people’s who were Levantines, Egyptian, Berber, etc etc
In the same way that Turks have, on average inky about 5% turkiC blood, like the Azerbaijanis. Yet they consider themselves Turks.
If you add up all the speakers of Romance languages (Spanish, Portuguese, French, Italian, Romanian, Catalan, Sardinian and others) it may be around 900 million people. Very few of them have ancestors who spoke Latin in 250 B.C.