Identify politics has been on the rise for a long time. The right heavily contribute to identity politics. See: openly racist GQP leaders, transgender bathroom ban, mexican "caravans" conveniently appearing in the news around election time, satanic panic, homophobia, muslim ban, "Kung flu".
In no way can you place the blame for the rise of identity politics squarely on progressives. I get the feeling that most people opposed to a more fair and equitable society are the ones currently benefitting the most from inequity.