If this was just an article criticizing identify politics, that'd be one thing, but to identify it as a byproduct of capitalism is shortsighted and dishonest. Socialism has grasped with its own identity politics in every single socialist country: race, gender, ethnicity, and religion. These things don't just go away. And sure, it wouldn't be the " capitalist elites" pushing these items ....it would be the political elites and beurocractic resource managers (i.e. the nomenklatura) that would use the SAME EXACT POLITICS to sew class division (i.e. divide and conquer - exploit the differences of the opposition to prevent the formation of a unified resistance to any sort of political elite). It can also be used to solidify power for the political elite - for example, when Stalin deported certain ethnic groups ( Chechins, Crimean Tartars, etc) by labeling them as "counter-revolutionaries"). It can be used to marginalize dissenters, label them as "not true socialists", and accuse them of treason for not aligning with the class in solidarity.
Socialism isn't some magical fix to the world and will come with its own nightmarish list of shortcomings.