Is there any basis for it being controversial? I think the individual words could be described more specifically as divisive. In each case, one person used divisive language which discouraged the other person from wanting to participate in the game. I would argue that the words could be considered divisive because they are often in complete contrast (to the point of being offensive) to the other person’s view.

This section is divisive and to be a dj. — Oxford

To cause conflict between people: the highly divisive issue of abortion’