Oh! so what were the
IRA doing since the 1920 - 1968, 1970s, etc...etc... setting off bombs in England, and carrying out attacks against British Forces in Germany.
The Protestant
UVF in Northern Ireland.
What was
ETA in Spain doing for all those years?
The Palastinians came into the terrorism game when it became quite fashionable, with the
PLO and hijacking aeroplanes, along with the Germans, the Japanese.
Not to mention all the small African "Liberation" army types, terrorising various sections of the country, I supose if a list was to be drawn up just starting from Post 1945 we would have a couple of hundred names on it, and not just the Palastinian
PLO etc..
I suppose all of the above were only playing at being "soldiers."

I suggest you do some basic research before making such statements, when it comes to "terrorism" a whole lot more nationalities have been involved than the Palastinians.
Connaught Ranger