ED MORRISSEY: The media misses a good opportunity to keep quiet. “This brings us to the fallback notion that even if this shooting wasn’t caused by Palin or Tea Party activism directly, it still provides a teaching moment for the dangers of political rhetoric and that we should take advantage of it with some kind of national debate. That is nothing more than an attempt to impute blame where none exists and causality where it clearly hasn’t been established, or even suspected.”