Given the amount of bragging about it, it's weird to hear people playing "timid mouse" later when it's convenient to some other argument. It's like saying Japan was not the aggressor when it bombed Pearl Harbor because we were going to kick their ass in the end.
If you actually are interested in the legalities of Mandate Palestine, there is plenty on the web, like Wikipedia:
http://en.wikipedia.org/wiki/British_Mandate_for_PalestineIt is also easy to find stuff about Mandate Palestine coins, passports, etc. etc.