Over the past years I see less and less marxist and socialist willing to defend their position from an economical perspective, many seem to have little insight into what that even entails. Most back it because they view it as the most anti-racist position. Here is an example, Corbyn has changed is tune on Brexit because of the racist connotations. He is now against Brexit, and defends the EU despite it being a union for corporate free trade.
Peoples political beliefs are largely based around self-interest. White male Marxists are almost always communists because of the economic aspects. Marxists are anti-racist because racism is a force which prevents us from unifying the working class into a revolutionary force. The anti-racism is a tangential aspect of what we believe not the core.
Leo King
Anti-racism also helps worth recruitment.
Juan Garcia
Years ago, I used to be a center-right choad who opposed the left primarily because of the majority of its adherents' obsession with racial and sexual politics and bizarre ideas pertaining to such politics (gorillion genders, "this piece of media I'm looking way too far into is anti-black because of this obscure background detail" type stuff). It wasn't until I found this board (and joined the workforce) and was introduced to the original economic literature/theory that created the left that I realized what a fucking idiot I was.