Is that it all takes to question someone’s patriotism?

Michelle asked people from Ted Rall’s side to have the decency to question his patriotism…
Why would we question his patriotism?
Disclaimer: I really like Ted Rall’s cartoons, I even signed up to send him money for the libel suit he was considering filing.
I fail to understand how a cartoon like that would make Ted Rall unpatriotic? [...]