Ghassanids were Christian Arabs, they had settled the region like a couple centuries before Islam emerged but they're still absolute newcomers.
Also I can tell you this, Christian Palestinians are the worst rats, worse than the Muslim ones because they use their religion and superior socioeconomic status to push their bullshit on gullible Westerners even harder than the lizard-eaters normally do. They claim to be Christ's people even though they weren't even there and besides he was a Jew supremacist who compared Canaanites like the woman in Qana (Lebanon, btw) to dogs. They're filthier than Calcutta's sewers.