Wrong is wrong, no matter who points out the fact.
The cartoonists’ habit of producing vulgar, obscene, blasphemous filth was and is wrong. It’s wrong regardless of who says it. If you haven’t done so already, look up for yourself ... use your favorite search engine ... see for yourself what they were in the habit of publishing.
Murder is a greater wrong, far greater. The islamic filth should hang.
So what would you do about it?