How did they know!/s Can’t have an international conspiracy for world domination these days, without somebody twigs it.
Actually, Pashtuns are rumored to be the lost tribe of Ephraim. Only rumored, though.
And Naphtali, perhaps more.
Quest for the lost tribes of Israel Pashtuns / Pathans
https://www.youtube.com/watch?v=v-H1-uoAuDM