@marcan I'm sorry but you're escalating based on your subjective reading of Christoph Hellwig's mail. He has the opinion that Rust is detrimental to maintainability of the project and is acting to be heard. That's "everything he can do to stop this". He is entitled to (only) that.
This is the opposite of sabotage, which would be covertly attempting to hinder or damage R4L while feigning ignorance.
The way to proceed is for consensus or (Linus') fiat to acknowledge and overrule his concerns.