There is a group called sharia4belgium, a sister organization to the recently proscribed sharia4uk. This group has a website, on which advertisements appear. These advertisements are matched to the context of the web pages. This group wants to introduce sharia law in Belgium, and does not recognize the existence of Israel. Pretty scary lot. Yet, advertisers on this site include a company that offers online Hebrew course, taught by the best teachers from Israel.
De Standaard: Sharia4belgium moedigt lessen Hebreeuws aan