I don't really think so - because I don't see the splits that way, as many of the people angry about "reduced speech" are people with extremely high levels of speech as members of the ruling political class, like Ted Cruz - but this is somewhat similar to one of the theories about the modern American Right's appeal in the South - increased opportunity for minorities is seen as a threat to the folks used to having it all their way. Increased speech for previously-censored groups is interpreted as censorship of themselves.