Is anyone cataloging all the political violence of the left?
I don't know of a cataloging per se, but Reynolds at Instapundit.com seems to be pointing to what he knows of. For example, this Robert Musil bit from his blog "Climate of Fear".
I guess this is not terribly helpful, but it does show us two people that would probably properly handle news if we frwd it to them.
Of course (and you already know this) the best collection of info is probably right here on FreeRepublic, but wrangling it all together wouldn't be easy.