The part of Section 230 that is necessary is here: "No provider or user of an interactive computer service shall be treated as the publisher or speaker of any information provided by another information content provider."
Without this clause, the thinking goes, when you post on Facebook (i.e. when Facebook shows your content to others), you are posting as Facebook.
Without this clause, the thinking goes, when you post on Facebook (i.e. when Facebook shows your content to others), you are posting as Facebook.