At the same rally, they’d probably be demonizing men and railing against sexual stereotyping.
They can’t make up their minds what they really want or believe in, so what’s the use of trying to talk any sense to them?
Demonizing men in general, and fathers in specific, is the primary path to pro-abortion ideology.
When the fathers of the babies are dehumanized as presumptively negative, the babies can be dehumanized as presumptively negative by virtue of genetic inheritance, paving the path for their mothers to kill them.