Conquerors not colonizers, they had support from most of the major tribes. While recently they began acknowledging how diverse Saudi Arabia is, for the longest of time they had a policy of Najdification. They still show contempt to some aspects of the local cultures specially traditional Hejazi headdress.

I'm somewhat torn because there's a lot of positives but also some negatives that came from the conquest and unification of the Peninsula. I still prefer this outcome to being five or six different states, even if my ancestors fought for the Kingdom of Hejaz.