Many of these heretics do not know what they are doing. They are lifelong Democrats unaware of what has happened to their party. They attribute the abortion issue to the fringe, not realizing that they themselves are now the fringe of a demented, socialist, Marxist Party. Maybe telling them that they are practicing heresy would help wake them up to reality. That may be difficult for their disordered minds to comprehend.
Persistent and pernicious heresy most be exposed and fought constantly. We were warned by Pope St. Pius X when he condemned as heresy the Modernist views held by politicians.