One of the most basic lessons I would like leftists to learn with respect to being self-critical is to never use a tactic that you wouldn't like being used against you. Down through the years I’ve seen leftists use one or another dodgy tactic, then regret it later on. For example, it was fun to have special prosecutors go after Republicans, but it’s not so fun when they go after your side. Today, we have another example, that the shooter in Kansas City was inspired by leftists, who can now be blamed for it. The lesson – and this is in response to the left’s own pronouncements after the massacre by Anders Behring Breivik in which they blamed (among others) Pam Geller, Robert Spencer, and Daniel Pipes – is to be cautious about blaming pundits for what mass murderers have done.