This isn’t even an exaggeration btw. The Lehi (the more fascist counterpart to the Irgun who tried to ally with fascist Italy and Germany against the British) literally just called themselves terrorists.
If you count their predecessors, this has been going on since before 1948. This terrorist attack was done by Irgun, one of a few Zionist Terrorist groups from the time that merged together into the IDF in 1948.