That's not the case. While those who comprise the government of Israel are for the most part not religious extremists, there certainly are religious extremists in Israel who have their own agendas that, while they are often synchronous with the agendas of the government there, they are not always, and sometimes they even cause problems for the government. And the radical religious right in the US are very religious, and it really is not correct at all to suggest that they are not. They may be practicing a religion that other religious people don't agree with, or find distasteful, but they are strongly religious nevertheless.