Re: "The misdeeds of the past may be repeated, but we should do our best to prevent them. "
More easily done had Kahanists been the ones establishing the State back in '48.
But given the present day realities, my question is this:
How to create a viable Kahanist State out of what is present reality as The State of Israel?
I am asking for specifics set forth as a plan for action and success.
That's a good question that requires thinking realistically. Some people are incapable of thinking in such a manner.
Rather than focus on the simple-minded who would like to trash your question, let's focus on a parallel example in Jewish history and the pragmatic flexibility exhibited by one of the greatest minds in the history of the Jewish world, Rav Moshe Feinstein.
Example: It's all fair and well to label as a rebel a "frum-from-birth" religiously educated Jew who condemns G-d and spurns the mitzvoth by his free will, but what about the situation-on-the-ground that's been created in modern times due to unprecedented new "movements" (distorted as some of them are/were) combined with unprecedented freedoms and opportunities whereby a majority of the Jewish world are "secular Jews" - a persona which never had any real meaning in the past before all of these developments. ("Jew" was defined by doing what Jews do and acting as Jews do). How do we relate in Jewish law to Secular Jews who either don't know religion, weren't educated in it, have been taught a distorted/diluted form and reject that, are militant atheists because they don't understand the value of belief in G-d or practicing of Judaism, etc etc, and live lives similar to many fine gentiles? Should these, many of them born into this secular-Jewish "identity" not of their own volition, have the same categorization as actual rebel Jews? The answer of course, as determined by Rav Moshe Feinstein, was that we engage the reality on the ground and this new phenomenon is a likewise a new category. He thus considered such Jews as "tinok shenishba" - captives as children who were raised in foreign environment, and thus should be treated with kindness, we should reach out to them, etc. This is the predominant view in Jewish thought and inhabits almost all Jewish circles today.
This example just shows that real poskim have to engage themselves with the reality that exists, and new realities must be dealt with and understood with compassion
alongside principles and halachic precedent. So when creating a new "Kahanist state" that "Kahanist state" cannot be an ancient Biblical state or even a Talmudic state - it has to be a modern state based as much as possible on the
values of ancient Jewish thought and practice and as much as possible on the chazalic- Talmudic
principles that define Judaism. But this is only possible to the extent that the very large population of secular Jews will actually accept it or at least try it and go along with it at first. As time goes on, if certain things work, people will be willing to stick with them. Certainly there will always be objections and a minority voice (ie peace now people) who will be against anything Jewish, but I'm referring to major things where the country wouldn't function because of the massive unrest or unpopularity etc.