Musical opium for masses?

What is an international cultural event without some drama? What is that drama without Israel being involved in it? So, keeping up with the tradition, the upcoming Eurovision is supplying us with the current drama starring the Israeli entry. It looks like the Israeli song is facing a potential disqualification for containing a political message (more articles here).

Keeping my Israeli identity aside, what is the message conveyed by the Eurovision organizers? Is it that music (or art for this matter) cannot be political? Is the pop culture only about entertaining and once it is getting any message beyond fun and consumerism, it is no longer allowed? Is public forbidden to think while having fun? Is the mainstream musical culture simply opium for masses blocking them from critical thinking?