Stolen Virtue
Borrowing from Stolen Valour, Stolen Virtue is the behaviour of falsely celebrating yourself as a hero of the culture wars. It's defined by people who seek to attach themselves morally to social change in exchange for virtue medals. Changes that they either previously resisted, or had nothing to do with implementing.
How's that hypocrite Senator from South Australia, eh? She's a lesbian, *and* she voted against same sex marriage when in government, but now she struts around at the Mardi Gras like it was all her bloody idea. That's textbook Stolen Virtue