“Carpet bomb the memes. Everywhere,” one anonymous poster on the message board 4chan wrote in response to one of Trump’s angry tweets about the whistleblower. “Time to rise up. Your president has asked for your help.”

The quest to identify the person who crafted the politically explosive complaint against Trump has become a fixation across the most extreme corners of such platforms as Twitter, Reddit and Gab — and has spread onto conservative news sites, radio shows and TV broadcasts.

The president’s scornful portrayal of the whistleblower shaped and stoked the online conversation throughout the week, as it descended into a case study of the Internet at its worst — frenetic, fueled by rumor and frequently racist, misogynistic and crude.

“the whistleblower is not white,” one 4chan commenter asserted Thursday, probably misreading a part of the complaint in which the whistleblower calls himself or herself a “non-White House official.” “see second set of bullet points on page 3. trump only has a handful of non white staff. I wonder who it might be.”