>>17810145op is right.
arabs diverged from canaanites over 12,000 years ago. at that time, proto-indo-european wasn't even spoken.
>the levantis a large region full of impassible terrain. lebanon is very hard to access when you're not coming from the sea. up to about 1500bce it was basically impossible coming from the east because the forestry was too thick.
>since antiquity"antiquity" from a european perspective is a bad joke.
>It would more like comparing Danemark and Englandnot even close to being as divergent culturally, climatologically, historically, genetically, linguistically or by length of time. celts and germanics are about as distant from each other as most semitic sub-families tend to be.
continual connection between arab and lebanese populations have existed for about as long as the english have lived on the british aisles. in "antiquity" for more than 2500 years, the lebanese had more contact with the cornish and the picts than they did arabs. that really only changed with the islamic conquests 1100 years ago.
the problem you face is that you simply don't understand the history of the region, its geography and how its evolved. you only have flitting shadows of insight.