Israel is clearly doing this by massacres in palestinian land.
Their political objective is to completely conquer palestine, and making palestinians surrender for this purpose.
I think "state institutions such as armies, intelligence services and police" is the best definition for israel
But I don't understand what you wanted to prove with this? you think I don't know how the dictionary defines terrorism? if so then grow up.
Nowadays, nothing is crystal clear. From one angle of view, every institution and organisation is terrorist. From united states bringing disastrous "democracies" to middle eastern countries to China brutally ruling over east turkistan and tibet to Myanmar's civilian people massacring muslims, all can be called Terrorists according to the above definition.
Similarly, nobody is "really" a terrorist, if you look from another perspective. Everybody fights for a reason, some of them don't have the media to inject their ideas into minds of humble people though.