As you may know, comic strips are drawn well in advance of publication and the Sunday sections are drawn even farther ahead of the dailies. The Sunday sections are also usually printed well in advance. As a result, on Sunday, May 23, Doonesbury is in the unfortunate situation of having a strip that involves a severed head…done well before the Nick Berg incident. One suspects folks who don't know about lead times will be attacking Mr. Trudeau for exploiting the murder for his own purposes.
[UPDATE at 4:12 PM: Corrected the date of the Doonesbury strip in question. So sorry.]