It used to be just bad jujitsu -- if you look at the book Fighting Fit by Col. David Ben - Asher of the Israeli Defense Force , you can see that -- .
It 's evolved into a very good striking system .
It used to be just bad jujitsu -- if you look at the book Fighting Fit by Col. David Ben - Asher of the Israeli Defense Force , you can see that -- but it 's evolved into a very good striking system .