You have it twisted, I think, the words about vengeance, I guess that is the Zionist take on vengeance, that it belongs to Jewish children to go out there and forcefully take! The Zionist way to teach the child!
The Biblical view of vengeance I was taught is Vengeance is mine, sayeth the Lord.
Another funny thing, what I read in that article Girls At War, is the story of little girls Tamar was growing up with who rejected that idea that vengeance was taken through building. They had other ideas about vengeance, like going to the road with the whole settlement community and throwing rocks at passing Palestinian cars. I think they went to do that the day after the Fogels were killed, that is what the article says, the adolescent girls who were interviewed said they all participated, it was a settler community event.
Vengeance is in the hands of HaShem, to strike the wicked and teach them they were mistaken ("He will fight for you, and ye shall hold your peace"). That is why vengeance should not come by the sword or the bloodshed, and the Fogels knew that. The solution they have is the calling to Israel to stand strong and not surrender to the enemies. So Tamar Fogel told herself to the nation. She said "They won't defeat us, we will continue to built and bloom" ("But the more they afflicted them, the more they multiplied and the more they spread abroad.")
Tamar's best ANSWER to the beast who slaughtered he baby siblings, and her noble parents, is to grow, build Israel, have many fat babies and teach them that the nation of Israel will never turn the other cheek.
Not killing and not insulting and not humiliating anyone. Simply live in Itamar, build Itamar, give birth to children in Itamar. May EVERY daughter of Israel look at Tamar as a role model of surviving even with anger and sadness and grief.