I don't know what you try to frame as 'Zionist terrorism'. I am not a fan of many Israeli actions, but as far as I know there were no structural attempts of structurally terrorizing and brutalizing Palastinians by Israel that are in any way similar to what we see Isis doing today.
Acts of terrorism, including deliberate bombings, gunning down of civilians, etc., carried out by supporters of an independent Jewish state within what was then Mandatory Palestine by groups such as Irgun (a direct linear ancestor of the modern Likud Party.)
> I am not a fan of many Israeli actions, but as far as I know there were no structural attempts of structurally terrorizing and brutalizing Palastinians by Israel
Israel was largely built by people who engaged in terrorizing and brutalizing Palestinians in the name of the goal of creating the State of Israel. (To be fair, there was terrorism on both sides and organized terrorism on the Arab side against the Jewish side started first. But if we accept that targeting innocent civilians for terror is acceptable as long as someone did it to you first, well, most terrorist groups in history could point to someone who they saw as terrorizing the population they purport to represent first, and characterize their own terrorism as retribution against the group from which those attacks came, and supporters and sympathizers.)