It is. And this has, for decades, even before the existence of Israel, been the predominant activity that comprised Arab "resistance". The greatest degree of justice for the greatest number of people can be acheived at the negotiating table with Israel which the Palestinians can actually get to, like they did 7 years ago, by leaving behind violence and the fool's quest to destroy Israel.
Law expanding definition of terrorist activity passes first Knesset reading (Haaretz)
from the article: U.S. 'disturbed' by 'right to resist' clause in PA unity gov't platform