[expat2]

The real reason is that, as a small minority, they form a kind of secret-society whose members help each other, and hire other members where possible.

Many small minorities operate in this manner, including Jews in goy countries, Catholics in predominantly Protestant countries, and Freemasons in many societies.

[RobbyS]

Very plausible theory. At an Air base I worked out, the base commander was a Mormon. Pretty soon there was quite a few Mormon officers assigned to the base. This continued for several years because there was also a Mormon presence in the German Community. Like tends to promote like.

[kabumpo]

YES YES YES. Exactly like the Masons to the power of 100.
I know from working in arts/entertainment.