clipped from: www.huffingtonpost.com   
The killing of Dr. George Tiller is, of course, the second recent politically-motivated church shooting. The first occurred in the Tennessee Valley Unitarian Universalist Church on July 27th of last year.
both share a common element: Bill O'Reilly. O'Reilly had targeted Tiller repeatedly on his show
And as for the Unitarian killing, the shooter infamously had a copy of O'Reilly's book in his home, and wrote a vitriolic screed about his hatred for liberals.

Of course, the factors motivating each killing cannot be boiled down simply to the influence of Mr. O'Reilly. However, Mr. O'Reilly bears a unique responsibility for this kind of violence, not only because his show and opinions reach millions of viewers, but also because he is a figure who not only disagrees with but dehumanizes his opponents. Using words like "evil" and "villain" to describe his targets, O'Reilly turns political spats into sweeping moral crusades.