Brent Baker's March 30 NewsBusters post carries the headline, "No Time for a Real Threat as ABC and CBS Skip Arrest of Man Targeting GOP’s Cantor." Baker's premise is that the man who allegedly threatened Eric Cantor's life in a YouTube video is somehow more "real" than the "less-immediate threats against Democrats" that have been previously reported.
Baker has no basis, nor does indicate he used one, upon which to judge if one death threat is more "real" than another -- indeed, as Media Matters' Simon Maloy points out, the voice-mail death threats to Democratic congressmen seem plenty real.
Further, given that the suspect in the Cantor threat, Norman Leboon, has apparently made numerous video threats, including against Democrats and a roommate, it's a bit murky as to just how "real" that threat is, unless Baker believes video is more "real" than audio.
Baker's post was followed up by a post by Scott Whitlock in which he complains that network morning shows ignored the Cantor threat, though he did manage to stay away from pronouncing that threats against conservatives are more "real" than those against Democrats. Whitlock, like Baker, failed to note that Leboon has issued a plethora of threats against Democrats too.