The insults are very crude but culturally apppropriate to show Israeli disdain for Nasrallah and the hezzies.
In fact, the crudity of the song's words shows how different Israelis are from the US. Much more "eastern european" or even Russian in their attitudes. This was a surporise ot me when I viisted Israel. They are our ally, but in many ways they are quite different from us and I don't think people who think they are the US "mini-me" expect or understand that.
http://www.youtube.com/watch?v=9WxQcWNHmAo
I especially liked the lack of PC. Most Israelis that I deal with tell it like it is without embellishment. When you come across someone like that you know where you stand and there is no second guessing as to what was meant.