The dildos are to outrage and draw attention.
Remember all the protests where liberal women disrobed to make a “naked” protest?
It is to draw attention. It draws attention but also creates negative associations.
A secondary reason is to attack Christian ethics. In Christianity, sex is to be held in tight control, with significant self discipline. Modern leftism totally rejects that idea as evil.
To modern “progressives” there should not be any limits on sexual appetites.
I think the message is that women advocating for conservative causes deserve to be raped
Just look at how often their heroes and idols call for that
The sistahs wouldnt be waving plastic penises at men