I think the Zionist project (like the Templer movement that preceded and inspired it in many ways) was a "feel good", not so much crusading as pioneering movement to start off with. I think Hitler's evil regime gave it the "do or die" spirit that moves Israel to this day. Herzl just wanted "nest year in Jerusalem" to be true, and to live in the old country" that so many in Europe enjoyed or contemplated. There were gradual stages where got real, such as the Balfour declaration (essentially a bid by the British who thought there was a Jewish conspiracy in favour of the Kaiser to win the Elders of Zion over).
The "Arab" identity is a fascinating term. I read a fascinating book by a Swede called 'The Arabs in Antiquity" which looks at the use of the word pre- and post-Revelation (as in Mahmud's revelation of the Koran from Gibreel). It seems Arab was possibly a term for a caste within the desert nomad society, associated with camel raising and the care of certain oases and ritual behaviours, and conferred a high status. The author argues they were displaced by the Saraceni, a horse rearing tribe and later caste, but retained residual status down to the time of Mahmud, who may have been a member of that caste himself. The identity became an aspirational part of Islam, conferring a recognised status on the new religion.
"Arab" now gets applied to a bunch of people from Morocco to the Euphrates, and there are some clearly African looking people in Sudan identifying as Arab. I have Lebanese friends and relatives who have a distinct culture and outlook from my Egyptian friends and acquaintances, apparently they speak a different dialect of Arabic, no doubt the differences are as obvious between various Yemeni, Saudi, Iraqi etc groups. I think the Arab identity has mixed cultural and religious strands and has too many layers for simplistic understanding. Its more complex even than the Jewish identity, and that's saying something.
A mate of mine goes to Jerusalem for his holidays every couple of years. he says the "archaeology" practiced in Israel is patchy at best: most sites are designated as remains of ancient Israel, and other identities often not recognised at all. Its the usual nationalist nonsense. Its a cheap throwaway line to say 'they're Arabs, why don't they go back to Arabia?" or 'there are no Palestinians, only Arabs, they're nomads and they don't live in one place".
I think its possible to have multiple identities: religious, national, local, cultural, political and so on. I think Palestinian Muslim and Christian and Jewish people have a common identity from their place of residence as well as their cultural and religious even Imperial associations.