With any thoughful analysis of Stacks carefully chosen words, Stack hardly fits the profile of anyone who would show up at a Tea Party protest. Quite the contrary, Stack quite clearly fits the profile of a left-leaning Anarchist. And more importantly, he fits the violent variety of anarchists who start riots at G-8 and Global Warming summits.
http://freedomist.com/2010/02/19/just-who-was-the-irs-bomber-joe-stack/