No one. Plenty of people study Marxist philosophy though. It doesn't mean they are communists. If you read the question she was replying to then her answer makes sense. Picking out "We are trained Marxists" without context paints her words in a different light.
It was her phrase: “We are trained Marxists”.
You don’t need to pick it out. It jumps out.
You would struggle to come up with a context that even slightly alters the meaning. It isn’t capable of a neutral interpretation.
Ditto the very clear policy aim to “defund the police”.
These things are very clear and were very, very disappointing to a lot of people who thought BLM was a good, straightforward anti-racism campaigning organisation.
It’s quite hard to believe you’re as clueless about all this as you are presenting yourself to be.