people often don't do what's best for them. But that's a separate issue from trying to convince someone to join your cause. If you're representing advocacy group X and you're being melodramatic and throwing a tantrum, rather than pinpointing the issues you want to solve and proposing solutions, I'm much more likely to think that said group is composed of adult babies making childish complaints and unworthy of respect or attention. You'd be essentially leaving it to me to independently discover if there is any value in the group, rather than taking the opportunity to inform me yourself.
They are not trying to convince you to join their case. Neither group. You are unlikely to be in position to do anything about their cause and even if they convinced you, you would likely remain passive.
Both are attempting to force change or prevent change. For all values in calm rational discussion pleasant discussion, it does not bring change. It makes you pleasant, but does not really bring results where real stakes are in question.
