A couple of semantic differences:

According to CP3S and reportedly the dictionary definition (too lazy to look it up, but I believe him), murder is killing someone illegally.

According to Warbler, murder is killing someone innocent.

My personal definition would be knowingly and with malintent killing someone innocent. It doesn't fit the dictionary defintion, but it fits my moral sensibilities.

And while it's clear I disagree with you, CP3S, on a number of issues in this topic, I will let Warbler address your comments directed at him. As for jerk churches, the Westboro Baptist Church protest a number of things, such as gays, war, various religions (i.e. Catholicism, Islam, Judaism, and often protest at the funerals of gays and military personnel. As a Mormon, I feel somewhat left out ;) We haven't gotten a whole lot of attention from them, it seems. So indeed, these are the jerks you were referring to.