Ok, I understand, but the mores of the day can go in the wrong direction. We hope they are positive but there's no guarantee they will be today, or in the future. However your comment raises one major point about mores of the day: They were accepted then but found later to be awful.

People can be wrong and later realize their mistake, it's not something we think about when supporting a cause; how will I be viewed in the future for this? Maybe we should.. Until then, anonymity in donating allows someone to express their opinions as they see the mores of the day to be, now, without fear of retribution, and protected for the distant future when they've realized how wrong they were and changed.