Culture is borderline irrelevant. We could turn this discussion into a very long and extremely boring thread about how the Arab nations had such and such a model tank rather than this model tank and how their logistics were blah blah blah, but that would be pointless. Give a man a gun, give him a few weeks training and a lifetime of nationalist myths and hate and he'll fight as long and as hard as someone who has lived in the mountains all his life fending off rival tribes with a Victorian rifle and a knife as long as your arm.

Besides, those same Arabs who are supposedly not good at modern warfare managed to keep the United States bogged down in Iraq longer than it took to take down Nazi Germany...
okay the Germany reference is worthless as you well know. and they are not fighting a modern conventional war. they are using terror and guerrilla tactics. giving a man a gun and a lifetime of etc. will make him not a good soldier....... but lets presume it does. the problem with Arabian armies is their poor leadership and lack of an NCO corp. their fine soldiers individually.