Liberals hyperfocus on identity issues because they cannot talk about class within the framework of a systemic critique of capitalism. The system is sacrosanct for them and in order to compensate and distract from their failures to materially improve the lives of the working class they over-emphasize and exaggerate their achievements in the cultural sphere. In reality actual progressive cultural achievements by liberalism have been extremely few and far between, and more tangible progress was achieved in terms of things like women’s liberation, anti-racism, etc. in revolutionary societies like the USSR and the People’s Republic of China within the span of the first few years of their existence than liberalism has achieved in decades. And most of the social progress in the West has benefited the well-off upper-middle class and above, while poor, working class women, people of color and LGBT people to name just a few groups, are still disproportionately victimized by the capitalist system. Even today while the US is backsliding heavily in terms of women’s reproductive rights and falling into anti-trans hysteria, China is quietly making steady progress on LGBT issues. It is clear only a revolutionary socialist system can achieve true liberation for all marginalized groups, and conversely only by allying with the most marginalized in our society - who are naturally the most revolutionary and the most aware of and opposed to the system that oppresses them - can we build a revolutionary movement rooted in the entire working class, not one divided against itself by various bigotries. Remember that bigotry serves an important function of social control for the ruling class.