Were they the Arabs worst enemy at the time? Wasn't there a complex power sharing plan that wasn't implemented by the UN? Didn't the mostly European zionists seize power in 1948 and start kicking the arab speaking natives of Palistine off their land? and which "Arabs" are we talking about? Natives of Arabia? Or all of the varied people of different diverse conquered lands who eventually picked up Arabic as a language?   

The situation is very complicated. The language, because of the history is full of traps.