This paper deals with the quality and the character of the interaction between actors in the Czech media sphere. The research fills the research gap by addressing the specific interaction of ideological opponents between journalists. The analysis begins with a quantitative finding that whereas the alternative media left publishes reactions to the mainstream media in its own media outlets, it does not publish them in the mainstream and the mainstream does not react to the leftist alternative. The factors that contribute to this one-sidedness according to the authors of the collected reactions include the lack of interest to publish opinion reactions on the side of the mainstream, the expectation of this lack on the side of the alternative, easier communication with the alternative leftist outlets, and a lack of space for reactions in the mainstream. The impact of such a disruption in one form of the public debate is according to the alternative left the building of opinion bubbles and a general threat to the democratic public discussion.