I suspect very strongly that each of your 'marginalised' groups would have much greater luck discussing politics at works than its opposite. I can't imagine any tech company these days allowing folks to use work time to support the traditional view of marriage, traditional gender roles or old-fashioned racial views (that last, in particular, is completely unimaginable — and that's a really good thing!).

I think the privilege right now belongs to those in those 'marginalised' groups, who have the privilege to advocate for their views.