[sershe]

No, it's not at all murder. At the very worst, it's disproportionate defense against crime. If you kill someone actively trying to kill you it's obviously fine, if you kill someone vandalizing a house it's the same principle; it would usually be disproportionate, but not wrong as such.

However, in this particular case, when fighting mob intimidation like this (or marxism in general, come think of it) ends justify the means.