We just had 4 years of an identity politics Republican president (which party has totally succumbed to its idiotic, tribalist, identity-driven, populist base, discarding a lot of good conservative ideas and values in the process), so your spin on this as being "entirely the current thing wrong with the left" is disingenuous.

Dems are holding the line far better, though they too will fail, and the progressive wing will take over the party, and I'm personally not keen on that, even though I agree with them on some things.