When Q-Anon spreads baseless pedophile ring accusations it's ridiculed but apparently doing the exact same thing for their side is fair game. Great display of double standards yet again.
I don't think that calling someone a pedophile is any more convincing than calling them a nazi. If anything, that'll just make them dig their heels deeper.
I don't think it's that they don't listen to anyone. People generally are open to hear different views as long as it's done in good faith rather that in the form of accusations. Nobody wants to hear from someone who openly treats them as second class citizens. If you treat them with dignity and are open to hear their views as well you're far more likely to get them to reflect on their own views too. Daryl Davis is a good example of this.