For Yemenis, probably because they have globally more SSA input from East Africa, so they are closer to Egyptians who have more deep african ancestry...
Estonians have 13% N-L1025 (FTDNA), so quite a bit less than Latvians and Lithuanians. The vast majority of that is N-Z16981 and there don't seem to...
You forget hyperboreans people or the "doggerland" for the first cities in Western Europe (sorry, I'm kidding, nothing has really proven historically...
