There are less then 6 million Jews, and I think more than 5 million Arabs in Israel if you count the filth of Gaza, Judea and Samaria. I believe there are about 1.3 Arab muslims Israeli citizens, and there are also many Arab non-citizens who live in Israel illegally and many of them are married to Israeli Arab citizens.
We also face a growing problem of illegal immigrants. The biggest group of these people are Africans black muslims (Sudanese, Eritreans and others) who sneak in from Egypt.
An additional problem is that Arabs are a majority of the population on the Galil and a large minority in the Negev. It is highly likely that in case Israel retreats from Judea and Samaria in favor of an Arab state, then as soon as the last Jew leaves Judea and and Samaria the Arab citizens of Israel will raise a new demand for an autonomy within Israel.