What was his role in the school thing? I never even heard of him until the Talk Show Host got elected.
He was at the forefront, look at the video's you see his face. His name was always said as well. He used that issue to get his "foot in the door" as they say into the Knesset.
Here a search with his name on this site alone (which I know you know about)
http://www.rationalistjudaism.com/search?q=dov+lipman