i recently read paper on their self identification. Rather recent. iirc split is something like:

- Israeli Arabs : 30%-40%

- Palestinian Arabs: 30%-40%

- Palestinians: 10%-15%

- Christian Arabs: 5%-10%

- Etc : 5%

Guy that I spent two years with in same room was self identifying as "Arab, Orthodox Christian, Communist".

Those who live in west bank have more permutations of identities, with some of them mostly identifying with their clan or religion