Any non-Jew who has gone through the process to become an Israeli citizen knows they are signing up to become a member a Jewish state whether or not you say the words "Jewish & Democratic" or not. It's already implicit. I was suprised it was not in the oath already. By the time you actually get to the stage of taking the oath the system itself has already made it pretty clear to you that they need to give you citizenship but only because it's the law. This reflects most Jewish Israeli attitudes. Some think no non-Jews should be citizens, some think it is good for diversity but most don't really care. All of these attitudes are present in the immigration (and other) laws and the attitude of the beauracracy that enforce them. For this reason I can't really see, on a practical level, why adding "Jewish & Democratic" changes anything. If you want to be an "inferior citizen" there are plenty of other laws in Israel to point to (marriage etc). Jewish Israelis are struggling to balance keeping / making their country a Jewish state while also being a rational and democratic nation.
Key U.S. House Democrat cites troublesome issues in Iran nuclear deal (Reuters)
from the article: Loyalty oath isn't racist, but it will destroy Israel