By working with other progressive movements, such as Black Lives Matter, LGBTQ+ rights groups, and labor unions, feminists can build a broad-based movement for social justice that addresses the needs of all marginalized communities.
This seems to me a bit question-begging. In terms of intersectionality, a whole lot of women are cis, het, white, and Christian. Why, then, does intersectional feminism demand they form coalitions with those who feel oppressed by cis-het white Christians? A case can be made, I think, that Second Wave feminism benefited from the fact that its proponent were cis, white, and Christian, and its beneficiaries were largely cis, het, white, and Christian. One might go so far as to call the movement of white women into the workforce the dying gasp of white oppression. So it seems just a bit glib to assume that women, as women, really do share political interests with any other marginalized group.