It's one I've made plenty of times before, but, given the rounds and rounds of "Democrats are doomed from playing identity politics!" garbage going around, I am going to make it again.
Hillary Clinton did not "play identity politics" by treating people other than straight, white, cis, Christian, able-bodied men as human beings.
The person playing identity politics in this election was Donald Trump.
And the only reason that it's not viewed precisely so is because we regard privilege identities as the norm from which all others deviate.