While I am disgusted with the anti-Zionist sentiment of many religious Jews, I wish to put it in context.
In the early days of Secular Zionsim the attitude of the religious was highly positive to the endevor of resettling Eretz Yisrael even though the leaders were secular. That changed when prominent Zionists like Achad Haam stated that the goal of Secular Zionism was to get Jews to abandon Torah.
Later after the State was formed hundreds of thousands of children who were religious were put into Communist Kibbutzim and ant-religious schools where their Torah was ripped from them.
Or look what the State did to Rabbi Kahane zt'l and does still to his followers, I even have a friend who briefly flirted with anti-Zionsim before becoming Kahanist he was so unhappy with the behavior of the State in particular the events that took place in Gush Katif last summer.
So the anti-Zionsim while foolish, and coming from a ignorance of Torah is not without basis, after this it should be obvious why some religious Jews are anti-Zionist.
I also totally understand why you would not be Frum and even agnostic if your only exposure to Judaism is a reform temple. If your ever interested in Judaism that is both Frum and Nationalistic(in truth they go hand in hand) check out Chabad.
Do you know what the Lubavitcher Rebbe said after the IDF captured Yerushalayim and didnt throw out the Arabs? Its a great quote
(This is paraphrasing) The Israeli government has made a terrible mistake, they have let 70,000 terrorists stay in Yerushalayim(that was the number of Arabs in Yerushalayim at the time) and hundreds of thousands more stay in the rest of Israel. Hopefully the government will gather the strength to throw all the terrorists out of Israel now and forever.