A Palestinian war against the settlers who would push Palestinians off their lands and make the lives of Palestinians miserable would be a moral war (if your notion of morality failed to consider the consequences to Palestinians of such measures). HOWEVER, an attack on settlers would not be practical. Israel is stronger thant he Palestinians and the media in the USA is incredibly biased towards Israel. Attacks on settlers will be militarily counterproductive and counterproductive from a PR perspective. The Palestinians need (1) a Ghandi not a warrior and (2) a Palestinian catholic group to appeal to Catholics in America.
Turkish jets take part in U.S.-led coalition strikes against ISIS for first time (Reuters)
from the article: Palestinians expected to leave direct talks