You are comparing apples and oranges! Settlers ARE prosecuted and held accountable (get your facts right!). How many rocket launching terrorists are condemned, let alone brought to a court of law? I suppose the UK, in your eyes, is not a viable state because the police were unable to control the rioters this summer?!
Report: Palestinian, 18, killed in clashes with IDF in West Bank (Haaretz)
from the article: Israel slams Abbas in letter to UN following Gaza rocket fire