The 15th of the Federalist Papers says that the essence of government is to make laws and by implication to enforce them. This in itself seems to be an argument why not to give power or vote for religious parties in Israel. [Even though the argument in the Federalist papers was arguing for a union of the states  as opposed to staying as they were an confederacy with no unifying centre.]

Even religious people in Israel would not like the religious powers to be to have power over their individual lives.

Learning Torah really ought not be mixed with politics.