As LangCleg says, they're not leftists. This is a neoliberal individualist ideology which appropriates the concepts and language of leftist class analysis before bursting out and destroying the host like something out of alien.
So far it's facilitated the appropriation of Marxist class analysis, anarchism, anti racism, transsexualism, lesbian and gay culture, feminism, womanhood, intersexhood. I've probably missed a few. Fuck knows where it's going to go next 