It is not any more effort to say “It is an unsubstantiated and unprovable rumor that ICE has deputized proud boys.” It is also a much more accurate reflection of the level of confidence.

If you call somebody’s claim “easily debunked,” that’s a proactive offer of counter evidence. It isn’t Gish gallop to accept that offer of counter evidence.

Anyway, where else is the conversation supposed to go? The post had the offer of an easy debunking and no other content.