I don't see why this would be so. I'd be very surprised if the CM series of games have not sold far more copies in the UK than in Israel. There are only about 7 million people in Israel.
BFC are targeting their biggest markets. US, UK, and Germany -- which will enable Canadian forces to be introduced as well. I bet BFC have sold more copies of CM in Finland than Israel.
Don't get me wrong, I think an Israeli module would be fun but it ain't gonna happen. Besides, I think a French module would be more fun in blue on blue games (I had to get that in there)