Is Glenn Becks Show on Fox Appropriate for Children or High school kids?

Usually whenever I see Glenn Beck 's show on Fox News. He is usually talking with a Nazi symbol in the backround, in clear view of the screen. Sometimes the Nazi symbol will be up the entire show. Some times he writes them on his blackboard. Sometimes he puts the symbol next to the president of the united states. If a Teacher, at either private or public school used the symbol like he does they would most certainly be fired. If teachers can't have red and black and white nazi signs, because it's offensive to some, why are children allowed to watch GB? I would be a little shocked if I went to my childs cl to find his teacher speaking with a nazi symbol in the background on the chalk board. So I understand the rule of not using it in the school systems. But shouldn't parents be given a heads up that this show contains this type of nazi imagery?