We are not a secular state. Unlike the United States, there is no separation between religion and state in Israel. We do have secularists in government, of course. We also have ulta-Orthodox Jews in government. Israel is a nation of Jews, not any subset of the Jewish people.
Israel is "secular" in the sense that the USA was secular yet with a lot of public chr*stian ceremonial up until about 1962. Halakhah is not the law of the land, and the state government and mechanism is different from that ordained in the Torah (Sages, Battei-Din, a King, the Kohanim, etc.). Judaism simply plays the public role that chr*stianity did in the USA until fairly recently.
I still maintain that advocates of a secular Jewish state should never have advocated locating it in the Holy Land. There is no way a Jewish state in 'Eretz Yisra'el can ever be shorn of its religious implications.