People who oppose subjectivism realize that their own persynal feelings may come from dishonorable sources. People can scientifically recognize that they like something that is not good for society or the future. For example, millions of parents like smoking, but they know that it is no good for their children. These smoking parents have conquered subjectivism.
Likewise, we progressives and the society as a whole like the most misogynist music there is and pay billions for it while still imagining that the society can do better. It's a matter of being objective about ourselves. MIM reviewers often like profoundly flawed music that needs to be banned or at least revised. Our Liberal and traditionalist critics who believe individuals are supreme and should remain unchallenged by science or Reason criticize us for wanting to ban or revise things that we like. We see otherwise and we even proclaim to the world that its tastes can change: we know it from experience. Often times it is enough for us to see through something scientifically for our tastes to change completely or at least some.
MIM will only succeed in transforming the culture when the people decide to support MIM in abolishing even cultural works that we all currently like. We can alter the tastes of those who are adults today, but even moreso children can grow up in a world without songs and movies glorifying gratuitous violence.
Imperialist country populations have to know that they are enemies of world peace right now. They will not like to hear that, but it's something that Reason can reveal to anyone. Conquering subjectivism is a big part of the self-transformation of all people but especially imperialist country people, who will most have to change for the world to survive.