I believe that the jobs in question involved working for the “zionist” economy.
By that token, any job is forbidden, since the commercial activity generated by any job contributes to the economy. Likewise, they shoudn’t be allowed to go to the grocery and buy food, since it contributes to the “Zionist” economy.*
The Wolf
* And, of course, they consider Zionism to be avoda zara, so they should not be able to do so, even at the cost of their lives.