Mandatory reminder that the edomites joined the ashkenazi around 600 AD, so today's White Europeans and Americans are the Israelites. Not sand niggers or Palestinians. No one lived in Europe before Exodus. You're not some cave man ice age savage. The earth isn't even 8000 years old.
It seems like it's the same as any pollen allergy. If you, or your ancestors, are not frequently exposed to a particular pollen compound, you're at risk for developing an allergic reaction to it. From what I've just read, olive pollen allergy is somewhat common across the Mediterranean, but Arabs in the Levant are particularly less affected than any other population, probably because they've been exposed to significant amounts of that pollen for many generations, whereas Israeli jews have not.
>The earth isn't even 8000 years old
Mandatory reminder that genesisSOC is fucking retarded