I lived a little while in Dearborn Michigan the largest concentration of arabs in the world outside of Baghdad.
To me, Arabs in the US are what you would expect, about a million times better then blacks and about a million times worse then Whites. Mostly a fairly decent people because they actually follow the religions they practice (there are both Christian and Muslim arabs in Dearborn). But an average lower IQ and poorer time preference along with not enough of a civilization oriented morality prevents them from creating white-like societies.
They also seem to have a much much lower level of violence on an individual basis then blacks. They are not especially prone to violent crime. They are fairly industrious but the lower IQ means the industrious is of a far simpler level then say creating a Silicon valley. Lots of thriving little businesses. On the other hand they don't regress to a "Detroit" either.
Group wise they pose a danger in white societies. An alien religion, a high fertility, a reluctance to assimilate. Witness the violence across Europe. Much more then the violence perpetrated by groups of hispanics here in the US where hispanics have a high individual level of violence but not much group violence.