Well the Israelis profile single white european women in their 20's and 30's as one of the highest risk threat actors because historically they are been the ones that knowingly or unknowingly been used to smuggle munitions or explosives pass security.

Being brown skinned an arab or a muslim isn't what would put you on top of their threat ranking.

If we want to be technical, it's a weighted random search based on historical observations.

It would be the exact opposite if 100% of the ethnically profiled individuals were terrorists.