In a scientific sense, it is obviously impossible to know whats in someone's mind. Also, I don't live in SF proper, but more like south bay. However, listening to the rhetoric at the time, it was not hard to guess that COVID policy came to represent the political gap between the two sides. So it stands to reason that in hyper progressive SF, any opposition to absolute closure would be seen as 'siding with the enemy'. If this does not sound reasonable, I'm afraid I cannot convince you and wish you best.