Yes, there were whole tribes of “Arabs” that originated as Christian or Jewish tribes who converted. And not just those living in Israel, but there were such tribes in Arabia proper at the time of the Muslim conquest.
Syria a fair amount of Christian Arabs too
And lebanon before Hussein I expelled the whatever freepers need to call them Palestinians was Christian dominant
That expulsion set in motion a dilution of the Christian dominance in lebanon but it’s come back some
Pre 1980 around 60% mostly catholic some orthodox
1985 down to 25%
Now around 40%
It’s very old Christendom
Jesus allegedly traveled as far north as Tyre