And if one of them actually manages to unite the Sunni Arabs? That has to be Israel's worst nightmare right now given how its current policies assume the Arabs will always remain divided and thus not pose an existential threat to Israel.
Israel's policies assume none of that, they know better. But at this point it is less likely than ever for Jordan and Egypt to seek a conflict with Israel (intelligence cooperation goes rather deep, especially with Jordan), Qatar are Sunnis themselves, and uniting all Sunni Arabs is about as likely as uniting all Slavs.