You think so. Well if Sally X is against homosexuals marrying but you know she can't change it, her opinion on this would not deter you from voting against her in an upcoming election, if her other views agreed with other perspectives of yours. At the same time, if you were vehemently opposed to this marriage, her view, despite her inability to change it, might resonate very deeply with you and cause you to favor her. While I understand there are many diiferent types of people out there that can serve as counter examples to this, my point is politics is complex and if we think someone is shooting themselves in the foot at first glance, we should probably take a closer look. Certainly, politicians do make blatant mistakes, but all choices are suspect and ought to be treated with scrutiny.