Actual Left-wing person, I just want to point out that the idea of judging people by their sex, gender identity and race is not a left wing stance, in the words of Dr King “a person should be judged by the content of their character”.
Defining people by their gender and racial characteristics is an ideology pushed by far right groups like fascists nationalists. In-fact the idea of a stratified society by any metric; whether its caste, race, gender, wealth or accomplishments is arguably right wing ideology as the extreme end of left wing thought is enforced equality of outcome for all (which is only possible without horrendous results in a post scarcity society), but I would say that any reasonable person would place the stratification by characteristics beyond the persons control as decidedly right wing with stratification by pure accomplishment being the only sort of stratification a reasonable left wing person would condone.
Therefore anyone that tries to say cis white people bad and trans black people good are not socially left wing and are actually racists and sexists. Your political affiliation is based on your social and fiscal policy, not how much you like gay people, black people or transexuals. It’s not possible to have a left-wing social policy, which by definition is based on equality of treatment, and have favourites or have one group with more or less protections than another.
To cite an example, artificially elevating ethnic groups to a higher societal cast by blocking white people from entering the professional management class and lowering the criteria for entry for minorities is a right wing policy, your maintaining the division in material conditions, just swapping out who the ruling caste is. A left wing policy would be aiming to dismantle the stratification and bring everyone’s material conditions on an even keel, if the results of that policy mean more barriers for another group it would be considered a failure.
If any further proof is needed than look at the results of Social Justice; ‘accidental’ segregation in schools, eroding of laws that prevent discrimination on protected characteristics, children being publicly shamed in schools before their peers based on their protected characteristics, people being fired based on false accusations of the protected class against the lesser classes, purging of education professionals on ideological grounds and abuse of censorship to not only silence descent but also to protect criminals in their own ranks. No self declared left wing movement should be resurrecting Jim Crow and Nazi though policing.
People frame Neo-Nazis Vs SJW’s as Right vs Left, Actually its Far Right vs a different Far Right.