Well, for a starter, solidarity is absolutely fundamental to leftist politics - we need the entire working class to organize collectively together. That means we need to ensure that our movement is inclusive and all pulling in the same direction as much as possible. If I go to a union meeting and there’s some guy there just unopposed making homophobic jokes, I will leave the union meeting. This is doubly or even triply more impactful for minority groups who are far more likely to be turned off from a movement which is not inclusive, but even allies in the majority group will be turned off by such behavior.

We need to always keep the class war centered in our perspectives, but we need to also be intersectional - if we are not also considering the ways that minority groups are uniquely and disproportionately affected by capitalism as well as by discrimination and other systemic issues, then we are doing the entire collective movement a huge disservice.