> We can also turn that around: the organisers are essentially being called a bunch of cruel racist assholes here, all without any real evidence.
You're getting evidence directly from someone who is a senior member of the Rust community and who participated directly in the original decision.
Imagine you hear a series of bangs, walk into your living room, and see Alice holding a smoking gun and standing over Bob's bullet-ridden dead body, holding a note saying "I wish Bob was dead".
One response is "well, we don't know what Bob did or if Alice actually pulled the trigger". Another response is "um, Alice, can you explain why you seem to have shot Bob?", and if Alice doesn't want to explain anything, you might start to draw inferences. But either way you might not want to hang around Alice until it gets cleared up.