J1 Anatolian Greek

I'm an Anatolian Greek American, and I recently took a DNA test from 23andme and got the result J-CTS5368. I've researched this haplogroup, and I can't seem to find a good explanation for why I should have J1 when my family is from Northwestern coastal Anatolia. It seems to have originated in the Caucasus and is most prevalent in Southern Mesopotamia and the Arabian Peninsula, so what's a good explanation for how it ended up here?