Lowenstein presents interesting information about the "settler" situation but his conclusion does not necessarily follow. Israel has its fundamentalists ("crazies") as does every society including ours. The overwhelming majority of Israelis will not let them prevail even if it means a civil war. Unfortunately the electoral system permits minorities to have a disproportionate amount of power in their Parliament so it makes it more difficult for the government to control the settlers' outrageous and unlawful behavior.
But the populace and now the government have come to realize that the settlers are a threat to a just and lawful society and are taking steps to remedy the situation.