It's complete bollocks and I hate it with a passion. It's a bunch of people playing a prestige point-scoring game with each other competing to be the most offended and show how "woke" they are. (I see
@MrPooni has already made his requisite appearance to pump up his sense of self-satisfaction by telling you how morally superior he is and belittling everybody else without actually talking about the topic for a second).
I'm probably about as left-wing as you can get. If there was a viable Communist party I'd be voting for them. However, this trend on the left in the past decade or so of militantly attacking anybody who isn't careful enough of someone else's "identity tags" is getting to be ridiculous. Identity politics is great when the goal is to make everybody's "tags" meaningless to create actual equality, not to actually fecking emphasise them, make them sacred cows, and make a person the sum of their "tags".
I think it originates from a morally good place but now serves nobody but those who want to score their little points and make themselves feel smug. The only thing is achieves in a macro sense is to have people who see how fecking ridiculous it is getting pushed to the political right. I think it has contributed quite a lot to the political polarisation we have now.
If you've got 20 minutes, social psychology professor Jonathan Haidt can explain it with much more eloquence and balance than I can after 4 bottles of Dragon Stout, from the perspective of American university campuses.