This is a pretty stupid decision from QF.
Firstly from a
PR point of view. Just look at the top comments on the social media articles and everyone is suggesting a boycott of QF and Jetstar rather than agreeing with their stance.
Secondly it's discriminating against this guy. Did he know beforehand about the protest? Maybe, maybe not. Maybe he's a really nervous flyer and a bit of commotion on the flight beforehand didn't sit well with him.
Everyone has a right to get off an aircraft before it leaves the ground if they feel uncomfortable. No matter the reason.