The fact that this vile creature is still walking around free and sermonizing in Israel, is a complete indictment of Israel as a violent, racist, misogynistic and morally-bankrupt entity that should have gone the way of the dodo decades ago, were it not for U.S.-based religious zealots propping it up financially and politically to help them bring about the second coming of their Messiah (notice that Israel is effectively their tool for bringing about the end of days - think about that for a second).
Now, why is it that despite Rabbis such as this, we have NOT seen widespread rape as a war tactic by the IDF? Simple: Because, much like in apartheid South Africa or even Nazi Germany, rape of women considered to be of a lower class of human beings is frowned upon or even strictly forbidden. It is no coincidence that we have not seen mass rapes in the Occupied Territories over the last 50 years - Israelis are taught from an early age to avoid Arabs like the plague, that any contact with them (especially of a romantic nature) is tantamount to heresy and that it is much preferable to kill Arabs than to capture them (a popular saying in Israel is "a good Arab is a dead Arab").
By the way, there is another Jewish Israeli "scholar" who advocated rape as a war tactic by the IDF - Mordechai Keidar. He's a regular pundit on CNN and other news channels, and is considered to be a confidant of the Jewish Home leadership (Naftali Bennett et al).