The Binladdin name is a very old one, originating in Yemen.
The old time Yeminis were good traders (Spices and Perfumes, including Frankincense and Myrrh) and since there used to be an open border between the old North Yemen and Saudi Arabia, Yemenis were permitted to own busineses in Saudi. The first Gulf War in 1990/1991 finally put pay to that arrangement when Yemen aligned itself with Iraq, with an arrangement to take over some of the Saudi oil reserves.

The actual Bin Ladin family is highly respected here, apart from just one rogue brother who the whole world knows (knew) about.

The Saudi Bin Ladin Group is a major construction engineering entity and recently built a huge American Military housing complex at one of the air bases here.

Don't forget Adolf Hitler was a Christian.