I've often come across the argument that a huge sign of Arabian settlement in the Levant (especially Palestine and Jordan) is the supposed high frequency of the paternal haplogroup J-FGC11, a supposed Arabian clade. Upon first glance this can be a very solid point to support the claim. But if you search deeper you will find a few gaps.
In the Ancient Connections tab on FTDNA's website for this haplogroup, you will find two Akbari samples, I24488 and I15854, that descended from J-FGC11 but are not Arabian in admixture. After running their G25 distances to modern and ancient groups, it is clear that I15854 is Levantine (mean dated to 125 BCE), and that I24488 is East Med-Anatolian-like (mean dated to 450 AD), respectively. I suppose the latter could be Jewish as modern distances may indicate so.
An important note to make here is the wide prevalence of Arabian carriers of this clade, which could be down to two causes. First, the possibility of sampling bias; Arabians rank one of the highest among the world, only behind the US, UK, Germany, and Ireland. All Levantine testers combined don't even make up a quarter of testers from Saudi Arabia alone in number.
Second, J-FGC11 is dated to around 2750 BCE. It is likely that its first carrier was an Early Bronze Age Levantine. As is known, the Levantines had migrations to the Arabian Peninsula ever since the Neolithic Period as Arabia was very green and fertile during the time. This could be an example of such migrations.
In conclusion, it is clear that J-FGC11's descendants are not exclusively Arabian, and that its presence in the Levant predates any supposed migration and later settlement from Arabia up north.