yes,not all arabs are muslim,lebanon,egypian,etc,they are arabs but not a muslims,the misconception about the muslim is so much, there is also so many type of muslim,im not talking about the sect,im talking about the person it self,as long as he or she believed that there is one god and mohd is a prophet he is muslim,but his not praying,he still a muslim,there is bad muslims also,a good muslim,lazy muslim,etc.all of them are muslim.that why any muslim need to do something to increase there faith.do your obligatory being a muslim...because god will asked...what did you in your life...Inshaallah god will caunts our good deeds.