I hate identity politics as much as the next guy, but I think a lot of Fukuyama's takes here are pretty bad. He repeatedly paints massive groups with a large and indiscriminate brush. For instance:
"The right seeks to cut off immigration altogether and would like to send immigrants back to their countries of origin."
Uh, what? The United States is a nation of immigrants and we all know it. I don't think anyone wants to send immigrants back, it would be illegal and unconstitutional as well as impossible. Now, restricting ILLEGAL immigration on the other hand? Yes, basically everyone on the right supports this. But not wanting illegal immigration is literally on the other side of the map from not wanting any immigration at all and sending back immigrants.
I don't lend much credence to this guy anyway, considering that he thought history ended in 1992, as other comments have mentioned. But I think just as important as identity politics is defining the opposing side by the worst ideas of its supporters. For example, defining Democrats by "defund the police", or defining Republicans as the party of "white nationalism". There are tons of people on both sides who don't believe in this crap and are dedicated to the core ideals of economic prosperity for all and expansion of opportunities. Tuning these crazies out would go a long way to calming down the discourse in this country, but I don't think essays like this really help the situation.