I know you know but It's from the fascist propaganda playbook.
It's Us vs Them and faux victimhood.
Us uses the typical heavy nationalism verbiage ('real Americans', 'real patriots', 'this is MY country!!' etc) and Them being the scary monsters and super freaks.
An Us vs Them is easy to understand and the only qualifier to be in the 'us' group are easily identifiable in general.
The former gets people pissed off and paranoid while the latter is used to justify the behavior that follows to remedy the 'problem'.
Calling someone a pedo is accusing a person of the absolute worst behavior in the world so it's effective as a triggering insult and for triggering an emotional response out of the pissed off and paranoid.
A large majority of strongmen fascists play the pedo card on their enemies.
Always have, always will.
This is Jewish collecting Christian baby blood.
This is Jewish mutilating Christian children propaganda.
Same shit tactics, different decade.