I'd like to think it was perhaps at best naivety on the part of the production team, but I rather think they were deliberately being the broadcast equivalent of goady fuckers.....if you see Kaye Adams response to the criticism of the programme she talks about strong, decisive and unpalatable views - and says - do what the texters and callers did, join the conversation.
So really, they know what they are doing - platforming contentious studio guests - audio clickbait - people react, the switchboard "lights up" - "engaged" listeners, happy producers. Job done.