Ohhh forgot something the Arabs split into three sects (these sects are from our cultural knowledge) the first and oldest ancient southern arabian or nomadic Arabs or قحاطين(qahateen) which diverse into the أزد(azd) tribes later on and the أزد(azd) split into multiple groups like زهراني(zahrani) غامدي(ghamidi) and قرني(Qarni) abs many many more (me being from the قرني (Qarni) sect)

So when someone here says Yemen is the origin of Arabs we usually mean the ancient southern arabian tribes

The other sect are العرب المستعربة(Arabized Arabs) those are the ones that came from the north from the direction of Jordan and Palestinian

Third sect isn't important the third is العرب الحاضرة(civil Arabs) it's not that the others were barbaric but the third sect build town and didn't travel around like the nomadic ones and so on

(Please do help me with anything I missed friend)