An excerpt from Reb Akiva at Mystical Paths:
The position of the Lubavitcher Rebbe has always made the most sense to me as a religious Jew, it is: vote for a religious party and a party that protects the Land of Israel’s territory (that does not go with “land for peace” – or as can better be written nowadays “land for pieces of Jews blown up”).
The problem is that the seemingly ultra-orthodox Jewish religious parties, United Torah Judaism and Shas are: NOT RELIGIOUS, and have demonstrated historically that they have no care for protecting the Land OR the citizens of Israel.
What they are is good old fashioned patronage parties for their segment of the observant Jewish community, meaning they exist to funnel government budget and resources to their people. This is easily demonstrable by looking at their record: when religious issues have arisen, such as Shabbat construction on public infrastructure in Tel Aviv – they avoided being drawn into the issue (of governmental desecration of the Sabbath) which could have forced them to leave the government coalition. And they have supported land for pieces of Jews (for additional budget allocations). But on budget issues and control issues of certain government authorities, they will push it to the limit.
It should be no surprise they have strong support among their constituency and are growing through the strong demographic growth of their segment of society. After all, if your jobs or yeshiva or synagogue are dependent on their party success… you are theirs.
…
As a religious Jew living in the Land of Israel, I consider it prohibited to vote for United Torah Judaism or Shas, as both have never shown any concern for the Land of Israel or for the safety of the citizens of Israel, nor for the religious character of the State, which is the responsibility of every Jew, particularly those who call themselves religious.
See the rest here.