"Antiabortionists are simply slavers. They want to dictate what a woman does with her body."

Weren't opponents of slavery sometimes criticised on the grounds that they wanted to dictate what slaveowners did with their property?

But I'd suggest that this is not an appropriate thread to carry on an argument about such matters, or about whether Vin Garbutt should be booked in particular festivals because of his views on this issue.
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As for the Facebook accusation about about Richard Digance, I get suspicious about that kind of thing, as possible instances of dirty tricks propaganda. Misdirected or phony accusations of racism can be a way of undermining and discrediting genuine warnings.