I think you are confused, this is not lemmy.ml, and lemmy is open source, which is the part where it definitely becomes a false equivalence.
Because just because the developers may be communists, that has zero bearing on the content of lemmy.world.
The developers do not own lemmy. And do not claim control of the platform.
Musk is a fascist who owns and control twitter, and has used it to push his fascist agenda, spending $40 billion to be able to do that!

Lemmy is by the people for the people.
Xitter is owned and controlled by the worlds richest narcissist, who has claimed total control, and is using it to push fascism.

So very much a false equivalence.