I'm intrigued by your willingness to use and to admit to using the metric "socially harmful" (as opposed to, say, "correct") to judge an opinion.
For example, what would you do if your own opinion (that is, your honest best assessment of what the truth actually was) was an opinion you judged to be socially harmful? Would you continue to hold the opinion, but try to avoid mentioning it? Would you publicly lie about your opinion? Would you express the opinion and expect public disapproval? Would you intentionally try to change your own opinion somehow?
Ooh, that's a fascinating question. I'm not completely sure how to respond, since I think the two are tied together— I use a more or less evidence-based definition of harm.
I mean, looking at it logically, thinking that all women want to have children wouldn't be prejudiced if all women actually did want to have children. Would it still be wrong to say so? I can't see how.
I guess if my assessment of the facts were greatly opposed to my values it'd probably imply some more significant cognitive dissonance.
For example, what would you do if your own opinion (that is, your honest best assessment of what the truth actually was) was an opinion you judged to be socially harmful? Would you continue to hold the opinion, but try to avoid mentioning it? Would you publicly lie about your opinion? Would you express the opinion and expect public disapproval? Would you intentionally try to change your own opinion somehow?